Gianluca Della Vedova,
Yuri Pirola and
Lusheng Wang. Beyond evolutionary trees. In Natural Computing, Vol. 9(2):421-435, 2010.
"In Computational Biology, the notion of phylogeny has become synonymous with tree-like evolution. Recent advances in the Life Sciences have suggested that evolution has a much more diverse course. In this paper we will survey some of the models that have been proposed to overcome the limitations of using phylogenies to represent evolutionary histories. © 2009 Springer Science+Business Media B.V."