1. A. Almeida, M. Almeida, J. Alves, N. Moreira and R. Reis, FAdo and GUItar: tools for automata manipulation and visualization, in vol. 564214th CIAA’09, edited by S. Maneth.Lect. Notes Comput. Sci.Springer (2009) 65–74.
2. Almeida M., Moreira N. and Reis R., Enumeration and generation with a string automata representation, Special issue Selected papers of DCFS (2006).Theoret. Comput. Sci.387(2007) 93–102.
3. M. Almeida, N. Moreira and R. Reis, Incremental DFA minimisation, inProc. of the 15th International Conference on Implementation and Application of Automata (CIAA 2010)Winnipeg, MA, Canada, vol. 6482 ofLect. Notes Comput. Sci., edited by M. Domaratzki and K. Salomaa. Springer-Verlag (2010) 39–48.
4. M. Almeida,Equivalence of regular languages: an algorithmic approach and complexity analysis, Ph.D. thesis. University of Porto (2011).
5. J.A. Brzozowski, Canonical regular expressions and minimal state graphs for definite events, in vol. 12 ofProc. of the Sym. on Math. Theory of Automata, edited by J. Fox.MRI Symposia Series, New York (1963) 529–561.