An efficient exact algorithm for constraint bipartite vertex cover
Henning Fernau
and Rolf Niedermeier
J. Algorithms 38(2):374–410, Feb 2001
Proc. 24th Symp. Mathematical Foundations of Computer Science (MFCS 1999), Lecture Notes in Computer Science 1672, Springer-Verlag, 1999, pp. 387–398
Tech. report KAM-DIMATIA 99-424, Charles Univ., Faculty of Mathematics and Physics, Mar 1999
http://www-fs.informatik.uni-tuebingen.de/~niedermr/publications/cbvc.ps.Z
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