L Breiman, JH Friedman, RA Olshen, and CJ Stone. Classification and regression trees (cart) wadsworth international group. Belmont, CA, USA, 1984.
Kenneth Church, William Gale, Patrick Hanks, and Donald Kindle.
Ronald M Kaplan and Martin Kay. Regular models of phonological rule systems. Computational linguistics, 20(3):331–378, 1994.
Fernando Pereira and Yves Schabes. Inside-outside reestimation from partially bracketed corpora. In Proceedings of the 30th annual meeting on Association for Computational Linguistics, pages 128–135. Association for Computational Linguistics, 1992.