@Article{BremerWanntorp1979,
AUTHOR = {Bremer, Kare and Wanntorp, Hans-Erik},
TITLE = {Hierarchy and reticulation in systematics},
YEAR = {1979},
JOURNAL = {Systematic Zoology},
VOLUME = {28},
NUMBER = {4},
PAGES = {624-627},
URL = {http://dx.doi.org/10.2307/2412572},
NOTE = {
http://dx.doi.org/10.2307/2412572},
KEYWORDS = {explicit network, from rooted trees, from species tree, hybridization, parsimony, phylogeny}
}