1. Aho, A.V., Peterson, T.G.: A minimum distance error correcting parser for context-free languages. SIAM Journal of Computing 1, 4, 305–312 (1972)
2. Aho, A.V., Ullman, J.D.: The theory of parsing, translation and compiling, Vol. 1, Sec. 5.1. Englewood Cliffs, N.J.: Prentice-Hall 1972
3. Aho, A.V., Ullman, J.D.: The theory of parsing, translation and compiling, Vol. 2, pp. 674–675. Englewood Cliffs, N.J.: Prentice-Hall 1973
4. Aho, A.V., Ullman, J.D.: Principles of compiler design, pp. 391–402. Reading, Mass.: Addison-Wesley 1977
5. Conway, R.W., Wilcox, T.R.: Design and implementation of a diagnostic compiler for PL/I. Comm. ACM 16, 169–179 (1973)