("Federal Computer Week" 6: 26–27, 1992)* Hancock, Bill ("Digital Review" 9: 40, 1992)* Power, Kevin ("Government Computer News" 11: 70, 1992)* Sammet, J. E. ("Communications of the ACM" 35 (4): 128–131, 1992)* Weiss, Eric A.
(Federal Computer Week 6: 26-27, 1992)* Хэнкок, Билл (Digital Review 9: 40, 1992)* Пауэр, Кевин (Government Computer News 11: 70, 1992)* Сэммет, Дж.