Every ternary permutation constraint satisfaction problem parameterized above average has a kernel with a quadratic number of variables Gutin, Gregory Z. Iersel, Leo van Mnich, Matthias Yeo, Anders 2012 - TUHH Open Research
All ternary permutation constraint satisfaction problems parameterized above average have kernels with quadratic numbers of variables Gutin, Gregory Z. Iersel, Leo van Mnich, Matthias Yeo, Anders 2010 - TUHH Open Research
Uniqueness, intractability and exact algorithms : reflections on level-k phylogenetic networks Iersel, Leo van Kelk, Steven Mnich, Matthias 2009 - TUHH Open Research