Parameterized Approximability of the Disjoint Cycle Problem. - Martin Grohe; Magdalena Grüber (ICALP, 2007)

On Parameterized Approximability. - Yijia Chen 001; Martin Grohe; Magdalena Grüber (Electron. Colloquium Comput. Complex., 2007)

Approximation of Natural W[P]-Complete Minimisation Problems Is Hard. - Kord Eickmeyer; Martin Grohe; Magdalena Grüber (CCC, 2008)