@inproceedings{SIGAda-1998-KiddleW,
	author        = "O. P. Kiddle and Andy J. Wellings",
	booktitle     = "{Proceedings of the ACM SIGAda Annual International Conference on Ada Technology}",
	doi           = "10.1145/289524.289629",
	pages         = "229--239",
	publisher     = "{ACM}",
	title         = "{Extensible Protected Types}",
	year          = 1998,
}