1. ‘SPITBOL version 2.0’, IIT Internal Report, 78 pp., 1971.
2. and , The SNOBOL4 Programming Language, 2nd edn., Prentice Hall, Englewood Cliffs, N.J., 256 pp., 1971.
3. Indirect threaded code
4. Threaded code
5. The Art of Computer Programming, Vol. 1, 2nd edn., Addison-Wesley, Reading, Mass., 1973, pp. 454 and 602.