Dora Giammarresi, Jean-Luc Ponty, Derick Wood. Thompson Digraphs: A Characterization. In Oliver Boldt, Helmut Jürgensen, editors, Automata Implementation, 4th International Workshop on Implementing Automata, WIA 99, Potsdam, Germany, July 17-19, 1999, Revised Papers. Volume 2214 of Lecture Notes in Computer Science, pages 91-100, Springer, 1999. [doi]
Abstract is missing.