Simulating Two-Dimensional Recognizability by Pushdown and Queue Automata .

Marcella Anselmo Maria Madonia Simulating Two-Dimensional Recognizability by Pushdown and Queue Automata . 43-53 2005 conf/wia/2005 CIAA http://dx.doi.org/10.1007/11605157_4 db/conf/wia/ciaa2005.html#AnselmoM05