@inproceedings{OOPSLA-1987-PenneyS,
	author        = "D. Jason Penney and Jacob Stein",
	booktitle     = "{Proceedings of the Second Conference on Object-Oriented Programming, Systems, Languages and Applications}",
	doi           = "10.1145/38765.38817",
	editor        = "Norman K. Meyrowitz",
	isbn          = "0-89791-247-0",
	pages         = "111--117",
	publisher     = "{ACM}",
	title         = "{Class Modification in the GemStone Object-Oriented DBMS}",
	year          = 1987,
}