Anne Kupczok Arndt von Haeseler Steffen Klaere An Exact Algorithm for the Geodesic Distance between Phylogenetic Trees. 577-591 2008 15 Journal of Computational Biology 6 http://dx.doi.org/10.1089/cmb.2008.0068 db/journals/jcb/jcb15.html#KupczokHK08