1. PDP-11/20/15/r20 processor handbook, Digital Equipment Corporation, Maynard, Mass., 1971.
2. MACRO-11 assembler programmer's manual, DEC–11–OMACA–A–D, Digital Equipment Corporation, Maynard, Mass., 1972.
3. The programming language pascal
4. Systematic Programming: An Introduction, Prentice-Hall, Englewood Cliffs, N. J., 1973.
5. Letters to the editor: go to statement considered harmful