Denis Béchet, Alexander Ja. Dikovsky, Annie Foret, Emmanuelle Garel. Optional and Iterated Types for Pregroup Grammars. In Carlos Martín-Vide, Friedrich Otto, Henning Fernau, editors, Language and Automata Theory and Applications, Second International Conference, LATA 2008, Tarragona, Spain, March 13-19, 2008. Revised Papers. Volume 5196 of Lecture Notes in Computer Science, pages 88-100, Springer, 2008. [doi]
Abstract is missing.