A Visual Query Language for Temporal Databases - Kouramajian, Gertz (1995)(Correct)
for Temporal Databases Vram Kouramajian and Michael Gertz Institut fur Informatik Universitat
Language For Temporal Databases Vram Kouramajian Michael Gertz Department of Computer Science Institut ftp.informatik.uni-hannover.de/papers/1995/KG95a.ps.gz
Generalized Congruences - Bednarczyk, Borzyszkowski, Pawlowski(Correct)
an additional bonus. Acknowledgments. Remarks of Michael Barr and Marcelo Fiore prompted our
to categories of fractions. Special thanks to Michael Barr and Andrzej Tarlecki for their comments ftp.ipipan.gda.pl/wiesiek/papers/categ.ps.gz