On Brambles, Grid-Like Minors, and Parameterized Intractability of Monadic Second-Order Logic

Stephan Kreutzer Siamak Tazari On Brambles, Grid-Like Minors, and Parameterized Intractability of Monadic Second-Order Logic http://arxiv.org/abs/0907.3076 2009 CoRR abs/0907.3076 db/journals/corr/corr0907.html#abs-0907-3076 informal publication