Iyad A. Kanj,
Luay Nakhleh and
Ge Xia. The Compatibility of Binary Characters on Phylogenetic Networks: Complexity and Parameterized Algorithms. In ALG, Vol. 51(2):99-128, 2008. Keywords: perfect, phylogenetic network, phylogeny. Note: http://www.cs.rice.edu/~nakhleh/Papers/algorithmica.pdf.
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