↑ Hickey, M.; King, C. (2001), The Cambridge Illustrated Glossary of Botanical Terms, Cambridge University Press
↑ Soltis, Douglas E.; Fishbein, Mark; Kuzoff, Robert K. (2003). “Evolution of Epigyny”. International Journal of Plant Sciences 164 (S5): S251–S264. doi:10.1086/376876.