Jochen Alber Henning Fernau Rolf Niedermeier Parameterized Complexity: Exponential Speed-Up for Planar Graph Problems Electronic Colloquium on Computational Complexity (ECCC) 2001 8 23 db/journals/eccc/eccc8.html#ECCC-TR01-023 http://eccc.hpi-web.de/eccc-reports/2001/TR01-023/index.html