Verbatim text: Kramer, K. U. 1990. Pteris. In: K. Kubitzki et al., eds. 1990+. The Families and Genera of Vascular Plants. 1+ vol. Berlin etc. Vol. 1, pp. 250--252.
Author: Kramer, K.U.
Year: 1990
Title: Pteris
Editor: Kubitzki, K.
Book year: 1990
Book title: The Families and Genera of Vascular Plants
Volume: 1
Pages: 250–252