@inproceedings{KV97b,
	author	    =   "O. Kupferman and M.Y. Vardi",
        title       =   "Weak Alternating Automata Are Not That Weak",
	booktitle   = 	"5th Israeli Symposium on Theory of
                         Computing and Systems",
        publisher   =   "{IEEE} Computer Society Press",
        pages       =   "147--158",
        year        =   "1997"
}