1. D. Angluin. “On the Complexity of Minimum Inference of Regular Sets”, Information and Control, Vol. 39, pp. 337–350. 1978.
2. J. Berstel. Transductions and Context-Free Languages. Teubner, Stuttgart. 1979.
3. A. Castellanos. “Funciones y Transductores Subsecuenciales”, Technical Report, UPI 01-03/98, Universitat Jaume I, Castellan, Spain. 1998. (In Spanish)
4. A. Castellanos. “Aprendizaje Aproximado de Transductores Subsecuenciales Aleatorios”, Technical Report, UPI 02-03/98, Universitat Jaume I, Castellón, Spain. 1998. (In Spanish)
5. E. M. Gold. “Complexity of Automaton Identification from Given Data”, Information and Control, Vol. 37, pp. 302–320. 1978.