@inproceedings{KZ02,
	author	    =   "O. Kupferman and S. Zuhovitzky",
        title       =   "An Improved Algorithm for the Membership
                         Problem for Extended Regular Expressions",
	booktitle  = 	"Proc. 27th International Symposium on
                         Mathematical Foundations of Computer Science",
        series      =   "Lecture Notes in Computer Science",
        volume      =   ?,
        pages       =   "?",
        publisher   =   "Springer-Verlag",
        year        =   "2002"
}