Verbatim text: Pryer, K. M. and C. H. Haufler. 1993. Isozymic and chromosomal evidence for the allotetraploid origin of Gymnocarpium dryopteris (Dryopteridaceae). Syst. Bot. 18: 150--172.
Author: Pryer, K.M., Haufler, C.H.
Year: 1993
Title: Isozymic and chromosomal evidence for the allotetraploid origin of Gymnocarpium dryopteris (Dryopteridaceae)
Journal: Syst. Bot
Volume: 18
Pages: 150–172