A fixed-parameter algorithm for the directed feedback vertex set problem.

Jianer Chen Yang Liu 0002 Songjian Lu Barry O'Sullivan Igor Razgon A fixed-parameter algorithm for the directed feedback vertex set problem. 177-186 2008 STOC http://doi.acm.org/10.1145/1374376.1374404 conf/stoc/2008 db/conf/stoc/stoc2008.html#ChenLL08