@articleAndries_Engels_Habel_Hoffmann_Kreowski_Kuske_Plump_Schürr_Taentzer_1999, title=Graph Transformation for Specification and Programming, volume=34, DOI=http://dx.doi.org/10.1016/S0167-6423(98)00023-9, number=1, journal=Science of Computer Programming, author=Andries, Marc and Engels, Gregor and Habel, Annegret and Hoffmann, Berthold and Kreowski, Hans-Jörg and Kuske, Sabine and Plump, Detlef and Schürr, Andy and Taentzer, Gabriele, year=1999, pages=1–54 
LibreCat: /record/7401
DOI: http://dx.doi.org/10.1016/S0167-6423(98)00023-9

@bookEhrig_Engels_Kreowski_Rozenberg_1999, place=River Edge, NJ, USA, title=Handbook of Graph Grammars and Computing by Graph Transformation: Vol. 2: Applications, Languages, and Tools, publisher=World Scientific Publishing Co., Inc., author=Ehrig, Hartmut and Engels, Gregor and Kreowski, Hans Jörg and Rozenberg, Grzegorz, year=1999 
LibreCat: /record/7510

@inbookHeckel_Engels_Ehrig_Taentzer_1999, place=Singapore, title=A View-based Approach to System Modeling Based on Open Graph Transformation Systems, booktitle=Handbook of Graph Grammars and Computing by Graph Transformations, Volume 2: Applications, Languages and Tools, publisher=World Scientific, author=Heckel, Reiko and Engels, Gregor and Ehrig, Hartmut and Taentzer, Gabriele, year=1999, pages=639–668 
LibreCat: /record/7518

@inbookHeckel_Engels_Ehrig_Taentzer_1999, place=Singapore, title=Classification and Comparison of Module Concepts for Graph Transformation Systems, volume=2, booktitle=Handbook of Graph Grammars and Computing by Graph Transformations, Volume 2: Applications, Languages and Tools, publisher=World Scientific, author=Heckel, Reiko and Engels, Gregor and Ehrig, Hartmut and Taentzer, Gabriele, year=1999, pages=669–689 
LibreCat: /record/7519

@bookEggert_1999, place=Wiesbaden, title=Kundenbindung aus Kundensicht: Konzeptualisierung, Operationalisierung, Verhaltenswirksamkeit, publisher=Gabler, year=1999 
LibreCat: /record/7663

@articleEshlaghi_Meier_Suter_Reuter_Wieck_1999, title=Depth profile of the implantation-enhanced intermixing of Ga+ focused ion beam in AlAs/GaAs quantum wells, volume=86, DOI=10.1063/1.371720, number=11, journal=Journal of Applied Physics, publisher=AIP Publishing, author=Eshlaghi, Soheyla and Meier, Cedrik and Suter, Dieter and Reuter, D. and Wieck, A. D., year=1999, pages=6605–6607 
LibreCat: /record/7693
DOI: 10.1063/1.371720

@inbookKremer_1999, place=Opladen, title=Realisierung fächer- und lernortübergreifender Ausbildungskonzepte, booktitle=Lehren und Lernen in der Aus- und Weiterbildung, author=Kremer, H.-Hugo, editor=Sloane, P.F.E. and Bader, R. and Straka, G.Editors, year=1999 
LibreCat: /record/8459

@articleKremer_Sloane_1999, title=Lernfelder - Motor didaktischer Innovationen, number=26, journal=Kölner Zeitschrift für Wirtschaft und Pädagogik, author=Kremer, H.-Hugo and Sloane, Peter F. E., year=1999, pages=37–60 
LibreCat: /record/8460

@articleKremer_1999, title=Can students act? Explorative Studie zum Erfolg fächer- und lernortübergreifender Maßnahmen, number=27, journal=Kölner Zeitschrift für Wirtschaft und Pädagogik, author=Kremer, H.-Hugo, year=1999, pages=93–110 
LibreCat: /record/8463

@inbookKremer_Wilbers_1999, place=Gütersloh, title=Das virtuelle Seminar “Wirtschaftspädagogik Köln-München”, booktitle=Virtus, virtuelle Universitätssysteme Köln: Jahresbericht 1998/1999, author=Kremer, H.-Hugo and Wilbers, K., editor=Bertelsmann StiftungEditor, year=1999, pages=93–99 
LibreCat: /record/8464