1. [Ada80] Reference Manual for the Ada Programming Language United States Department of Defense, July 1980. *(Ada is a trademark of the U.S. DoD)
2. [Don80] V. Donzeau-Gouge, G. Huet, G. Kahn, B. Lang "Programming Environments Based on Structured Editors: The MENTOR Experience" Note technique, Mai 1980, INRIA.
3. [For80] "Formal Definition of the Ada Programming Language" Copyright 1980 DARPA, published by Honeywell Inc., Cii Honeywell Bull, INRIA, Nov 1980.
4. [Gan81] Slide Presentation at CMU "GANDALF Software Development Environment" Carnegie-Mellon Univ., Computer Science Dept, 1981.
5. [Goo81] G. Goos, Wm. Wulf (editors) "Diana Reference Manual" Carnegie-Mellon University, Computer Science Dept. Technical Report CMU-CS-81-101, March 1981.