1. A. Aho, J. Hopcroft, and J. Ullman, Data Structures and Algorithms, Addison-Wesley, Reading, MA 1983, pp. 53–56, 64–69.
2. A. Aho, R. Sethi, and J. Ullman, Compilers: Principles, Techniques, and Tools, Addison-Wesley, Reading, MA 1986.
3. K. Christian, A Guide to Modula-2, Springer-Verlag, New York, NY 1986, pp. 328–331.
4. P. B. Hansen, Brinch Hansen on Pascal Compilers, Prentice-Hall, Engle- wood Cliffs, NJ 1985.
5. R. Hunter, Compilers: Their Design and Construction Using Pascal, John Wiley and Sons, New York, NY 1985.