Hans L. Bodlaender Stéphan Thomassé Anders Yeo Kernel Bounds for Disjoint Cycles and Disjoint Paths. 635-646 2009 ESA http://dx.doi.org/10.1007/978-3-642-04128-0_57 conf/esa/2009 db/conf/esa/esa2009.html#BodlaenderTY09