@articlePlessl_Platzner_2003, title=Instance-Specific Accelerators for Minimum Covering, volume=26, DOI=10.1023/a:1024443416592, number=2, journal=Journal of Supercomputing, publisher=Kluwer Academic Publishers, author=Plessl, Christian and Platzner, Marco, year=2003, pages=109–129 
LibreCat: /record/2420
DOI: 10.1023/a:1024443416592

@inproceedingsDücker_Geiger_Lehrenfeld_Müller_Tahedl_1997, place=Capri, Italy, title=A Visual Programming Language for Qualitative Data, DOI=10.1109/VL.1997.626593, booktitle=Proceedings of the 1997 IEEE Symposium on Visual Languages, author=Dücker, M. and Geiger, Christian and Lehrenfeld, Georg and Müller, Wolfgang and Tahedl, C., year=1997 
LibreCat: /record/39510
DOI: 10.1109/VL.1997.626593