8. N. Wirth, "The Design of a Pascal Compiler," SOFTWARE Practice and Experience, 1,309-333,1971. 

9. N. Wirth, Algorithms + Data Structures = Programs, Prentice Hall, Inc., 1976. 

10. D. Barron, "A Perspective on Pascal" and J. Welsh, W. Sneeringer, and c.A.R. Hoare, "Ambiguities and Insecurities in Pascal," Pascal­ The Language and its Implementation, John Wiley, 1981. 

11. International Organization for Standardization, Specification for Computer Programming Language Pascal, ISO 7185-1983, 1983. 

12. A.H.J. Sale and B. Wichmann "The Pascal Validation Suite," Pascal News 16, 5-153, 1979. 

13. N. Wirth, "What Can We Do About the Unnecessary Diversity of Notation for Syntactic Definitions?," Communications of the ACM, 20, 822-823, November, 1977. 

14. B. Wichmann and Z.J. Ciechanowicz, Pascal Compiler Validation, John Wiley, 1983. 

