Sandra Huerter Kai Salomaa Xiuming Wu Sheng Yu Implementing Reversed Alternating Finite Automaton (r-AFA) Operations. 69-81 1998 conf/wia/1998 Workshop on Implementing Automata http://link.springer.de/link/service/series/0558/bibs/1660/16600069.htm db/conf/wia/wia1998.html#HuerterSWY98