The solution of two star height problems for regular trees

Jean-Pierre Braquelaire, Bruno Courcelle. The solution of two star height problems for regular trees. In Maurice Nivat, Dominique Perrin, editors, Automata on Infinite Words, Ecole de Printemps d Informatique Théorique, Le Mont Dore, May 14-18, 1984. Volume 192 of Lecture Notes in Computer Science, pages 108-117, Springer, 1984.

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