1. J. B. Dennis, On the design and implementation of a common base language. Proceedings of the Symposium on Computers and Automata. Vol. XXI, MRI Symposia Series. Polytechnik Press of the Polytechnic Institute of Brooklyn, Brooklyn, N.Y., 1971.
2. Technical Report;P. Lauer,1968
3. P. Lucas and K. Walk, On the formal description of PL/I. Annual Review in Automatic Programming, Vol.6, Part 3, Pergamon Press 1959, pp 105–182.
4. Information Processing;J. McCarthy,1963
5. J. McCarthy, A formal description of a subset of ALGOL. Formal Language Description Languages for Computer Programming. North-Holland, Amsterdam 1966, pp 1–12.