@inproceedings{Kapp91b,
author = {G.~Kappel AND M.~Schrefl},
booktitle = {{Proceedings of the 7th International Conference on Data Engineering (ICDE `91), Kobe, Japan, April 8--12, 1991}},
pages = {530--539},
publisher = {IEEE Computer Society Press},
title = {{Object/Behavior Diagrams}},
year = {1991}
}