%0 Journal Article 
%F hrs76
%A III, Harry B. Hunt
%A Rosenkrantz, Daniel J.
%A Szymanski, Thomas G.
%T On the equivalence, containment, and covering problems for the regular and context-free languages
%J Journal of Computer and System Sciences
%V 12
%N 2
%P 222-268
%U http://www.sciencedirect.com/science/article/pii/S0022000076800384
%U 10.1016/S0022-0000(76)80038-4
%D 1976
%K regexp