Links
Dryopteridaceae
Widén, C.-J., Fraser-Jenkins, C., Reichstein, T., Gibby, & Sarvela, J. (1996): Phloroglucinol derivatives in Dryopteris sect. Fibrillosae and related taxa (Pteridophyta, Dryopteridaceae)
Ann. Bot. Fennici 33: 69–100 http://www.sekj.org/PDF/anbf33/anbf33-069.pdf