Structural complexity of context-free languages
Tài liệu tham khảo
Elgot, 1965, On relations defined by generalized finite automata, IBM J. Res. Develop., 9, 47, 10.1147/rd.91.0047
Ginsburg, 1966, 1
Kobayashi, 1969, Classification of formal languages by functional binary transductions, Information and Control, 15, 95, 10.1016/S0019-9958(69)90651-2