1. Syntactic complexity of ideal and closed languages;Brzozowski,2011
2. Syntactic semigroups;Pin,1997
3. State complexity of regular languages;Yu;J. Autom. Lang. Comb.,2001
4. Quotient complexity of regular languages;Brzozowski;J. Autom. Lang. Comb.,2010
5. J. Myhill, Finite automata and representation of events, Wright Air Development Center Technical Report 57–624.