McWhirter, I. P. Substitution expressions. (Russian) Zbl 0271.68060 Kibern. Sb., Nov. Ser. 10, 127-136 (1973). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 68Q45 Formal languages and automata × Cite Format Result Cite Review PDF