@inproceedings{3049,
  author       = {{Blömer, Johannes}},
  booktitle    = {{Proceedings 32nd Annual Symposium of Foundations of Computer Science}},
  isbn         = {{0818624450}},
  publisher    = {{IEEE Comput. Soc. Press}},
  title        = {{{Computing sums of radicals in polynomial time}}},
  doi          = {{10.1109/sfcs.1991.185434}},
  year         = {{1991}},
}

@inproceedings{21790,
  author       = {{Domik, Gitta}},
  booktitle    = {{New Results and New Trends in Computer Science}},
  editor       = {{Maurer, Hermann}},
  isbn         = {{978-3-540-46457-0}},
  pages        = {{91--107}},
  publisher    = {{Springer Berlin Heidelberg}},
  title        = {{{The role of visualization in understanding data}}},
  year         = {{1991}},
}

@techreport{8188,
  author       = {{Löhr-Richter, Perdita and Engels, Gregor}},
  publisher    = {{Leiden University}},
  title        = {{{Incremental Design of Conceptual Database Schemata with CADDY}}},
  year         = {{1991}},
}

@inproceedings{16912,
  author       = {{Domik, Gitta and Mickus, KD }},
  booktitle    = {{Proceedings of the 15th Annual Conference of the "Gesellschaft für Klassifikation e.V." University of Salzburg}},
  editor       = {{Schader, M.}},
  location     = {{Salzburg}},
  pages        = {{pp. 267--276}},
  title        = {{{Visualization in the Analysis Cycle of Observational Data, in Analyzing and Modeling Data and Knowledge}}},
  year         = {{1991}},
}

@inproceedings{39584,
  author       = {{Müller, Wolfgang}},
  booktitle    = {{Proceedings of the Workshop on Practical Computer Based Systems Engineering - its Scope and Methods}},
  title        = {{{Contract-Oriented System Design and Specification}}},
  year         = {{1991}},
}

@inproceedings{39583,
  author       = {{Lehrenfeld, Georg and Müller, Wolfgang}},
  booktitle    = {{Proceedings of the 1st EXPRESS User's Group Conference}},
  title        = {{{Validation of EXPRESS Models Using Prolog}}},
  year         = {{1991}},
}

@inbook{3050,
  author       = {{Alt, Helmut and Blömer, Johannes and Wagener, Hubert}},
  booktitle    = {{Automata, Languages and Programming}},
  isbn         = {{3540528261}},
  pages        = {{703--716}},
  publisher    = {{Springer-Verlag}},
  title        = {{{Approximation of convex polygons}}},
  doi          = {{10.1007/bfb0032068}},
  year         = {{1990}},
}

@inproceedings{7824,
  author       = {{Hohenstein, Uwe and Engels, Gregor}},
  booktitle    = {{Proceedings of the 9th International Conference on Entity-Relationship Approach (ER 90), Lausanne, Switzerland}},
  pages        = {{177--188}},
  publisher    = {{ER Institute}},
  title        = {{{Formal Semantics of an Entity-Relationship Query Language}}},
  year         = {{1990}},
}

@inproceedings{8259,
  abstract     = {{Semantic data models have been widely studied for the conceptual specification of databases. However, most of these data models are restricted to the description of the static structure of a database. They do not provide means to specify the dynamic behaviour of a database. This paper sketches a language for the specification of actions on databases which have been specified by an Extended Entity-Relationship (EER) schema. These actions are based on so-called elementary actions, which are automatically be derived from the EER schema. So, it can always be guaranteed that these schema dependent elementary actions preserve all inherent integrity constraints. The semantics of the elementary actions is given in two steps: First, it is shown how the semantics of a database schema, i.e., a current database state, can be represented by an attributed graph. Then, the semantics of elementary actions is given by programmed graph replacements.}},
  author       = {{Engels, Gregor}},
  booktitle    = {{Proceedings of the workshop on Graph Grammars and Their Application to Computer Science (1990), Bremen (Germany)}},
  pages        = {{344--362}},
  publisher    = {{Springer}},
  title        = {{{Elementary Actions on an Extended Entity-Relationship Database}}},
  doi          = {{http://dx.doi.org/10.1007/BFb0017372}},
  volume       = {{532}},
  year         = {{1990}},
}

@inbook{16738,
  author       = {{Dietzfelbinger, Martin and Meyer auf der Heide, Friedhelm}},
  booktitle    = {{Automata, Languages and Programming}},
  isbn         = {{3540528261}},
  title        = {{{A new universal class of hash functions and dynamic hashing in real time}}},
  doi          = {{10.1007/bfb0032018}},
  year         = {{1990}},
}

@inbook{16739,
  author       = {{Meyer auf der Heide, Friedhelm}},
  booktitle    = {{Lecture Notes in Computer Science}},
  isbn         = {{3540529535}},
  title        = {{{Dynamic hashing strategies}}},
  doi          = {{10.1007/bfb0029597}},
  year         = {{1990}},
}

@inbook{16740,
  author       = {{Karpinski, Marek and Meyer auf der Heide, Friedhelm}},
  booktitle    = {{Lecture Notes in Computer Science}},
  isbn         = {{3540529535}},
  title        = {{{On the complexity of genuinely polynomial computation}}},
  doi          = {{10.1007/bfb0029630}},
  year         = {{1990}},
}

@inproceedings{16741,
  author       = {{Dietzfelbinger, M. and Meyer auf der Heide, Friedhelm}},
  booktitle    = {{Proceedings of the twenty-second annual ACM symposium on Theory of computing  - STOC '90}},
  isbn         = {{0897913612}},
  title        = {{{How to distribute a dictionary in a complete network}}},
  doi          = {{10.1145/100216.100229}},
  year         = {{1990}},
}

@inproceedings{16742,
  author       = {{Gil, J. and Meyer auf der Heide, Friedhelm and Wigderson, A.}},
  booktitle    = {{Proceedings of the twenty-second annual ACM symposium on Theory of computing  - STOC '90}},
  isbn         = {{0897913612}},
  title        = {{{Not all keys can be hashed in constant time}}},
  doi          = {{10.1145/100216.100247}},
  year         = {{1990}},
}

@article{16824,
  author       = {{Meyer auf der Heide, Friedhelm}},
  journal      = {{Informatik Spektrum}},
  number       = {{4}},
  pages        = {{231--232}},
  title        = {{{Das Heinz Nixdorf-Institut der Universität-GH Paderborn}}},
  volume       = {{13}},
  year         = {{1990}},
}

@inproceedings{16913,
  author       = {{Domik, Gitta and Brugel, E.W. and Stencel, R.E.}},
  booktitle    = {{Proceedings of the 176th meeting of the American Astronomical Society}},
  number       = {{No. 2}},
  title        = {{{IRAS On-Line Catalogs at CASA}}},
  volume       = {{Vol. 22}},
  year         = {{1990}},
}

@inproceedings{15393,
  author       = {{Domik, Gitta and Brugel, EW and Stencel, RE and Vasudevan, S and Pang, J}},
  booktitle    = {{Bulletin of the American Astronomical Society}},
  pages        = {{828}},
  title        = {{{Applications of IRAS Preprocessing at the Workstation}}},
  volume       = {{22}},
  year         = {{1990}},
}

@article{15394,
  author       = {{Domik, Gitta and Brugel, Edward W and Stencel, Robert E and Pang, Jinzhong and Vasudevan, Subramanian}},
  journal      = {{Publications of the Astronomical Society of the Pacific}},
  number       = {{656}},
  pages        = {{1167}},
  publisher    = {{IOP Publishing}},
  title        = {{{Workstation-based preprocessing of IRAS sky-flux images}}},
  volume       = {{102}},
  year         = {{1990}},
}

@inproceedings{15395,
  author       = {{Mickus, KD and Brugel, EW and Domik, Gitta and Ayres, TR}},
  booktitle    = {{Bulletin of the American Astronomical Society}},
  pages        = {{1259}},
  title        = {{{A case study: Multi-sensor data analysis of hh objects via star: A scientific toolkit for astrophysical research}}},
  volume       = {{22}},
  year         = {{1990}},
}

@inproceedings{15051,
  author       = {{Mickus, KD and Domik, Gitta and Brugel, EW and Ayres, TR}},
  booktitle    = {{Bulletin of the American Astronomical Society}},
  pages        = {{828}},
  title        = {{{Star-a scientific toolkit for astrophysical research}}},
  volume       = {{22}},
  year         = {{1990}},
}