Endress, Peter K. (). „Morphology and Angiosperm Systematics in the Molecular Era”. Botanical Review. Structural Botany in Systematics: A Symposium in Memory of William C. Dickison. New York: New York Botanical Garden Press. 68 (4): 545–570. ISSN0006-8101. JSTOR4354438.
Endress, Peter K. (). „Morphology and Angiosperm Systematics in the Molecular Era”. Botanical Review. Structural Botany in Systematics: A Symposium in Memory of William C. Dickison. New York: New York Botanical Garden Press. 68 (4): 545–570. ISSN0006-8101. JSTOR4354438.