@article{FellowsEtAl11,
 author = {Fellows, Michael R. and Fomin, Fedor V. and Lokshtanov, Daniel
and Rosamond, Frances and Saurabh, Saket and Szeider, Stefan
and Thomassen, Carsten},
 journal = {Information and Computation},
 number = {2},
 pages = {143-153},
 title = {On the complexity of some colorful problems parameterized by
treewidth},
 volume = {209},
 year = {2011}
}