Project 4408: P. R. Crane. 1985. Phylogenetic Analysis of Seed Plants and the Origin of Angiosperms. Annals of the Missouri Botanical Garden. 72 (4):716–793.
Crane, P. R. 1985. Phylogenetic Analysis of Seed Plants and the Origin of Angiosperms. Annals of the Missouri Botanical Garden. Vol. 72(4), p. 716–793.