Kalvis Apsitis, Rusins Freivalds, Raimonds Simanovskis, Juris Smotrovs. Unions of identifiable families of languages. In Laurent Miclet, Colin de la Higuera, editors, Grammatical Inference: Learning Syntax from Sentences, 3rd International Colloquium, ICGI-96, Montpellier, France, September 25-27, 1996, Proceedings. Volume 1147 of Lecture Notes in Computer Science, pages 48-58, Springer, 1996.
Abstract is missing.