Charles Semple. Phylogenetic Networks with Every Embedded Phylogenetic Tree a Base Tree. In BMB, Vol. 78(1):132-137, 2016. Keywords: characterization, explicit network, phylogenetic network, phylogeny, tree-based network, tree-child network. Note: http://www.math.canterbury.ac.nz/~c.semple/papers/S15.pdf.
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