Alexander Okhotin, Kai Salomaa. Input-driven pushdown automata: nondeterminism and unambiguity. In Suna Bensch, Frank Drewes, Rudolf Freund, Friedrich Otto, editors, Fifth Workshop on Non-Classical Models for Automata and Applications - NCMA 2013, Umeå, Sweden, August 13 - August 14, 2013, Proceedings. Volume 294 of books@ocg.at, pages 31-33, Österreichische Computer Gesellschaft, 2013.
Abstract is missing.