Verbatim text: Christensen, C. 1913. A monograph of the genus Dryopteris. Part I. The tropical American pinnatifid-bipinnatifid species. Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd., ser. 7, 10: 55--282.
Author: Christensen, C.
Year: 1913
Title: A monograph of the genus Dryopteris. Part I. The tropical American pinnatifid-bipinnatifid species
Journal: Kongel. Danske Vidensk. Selsk. Skr., Naturvidensk. Math. Afd
Volume: 7
Pages: 55–282