5 literature references for Physcomitrella readeri Stone & G. A. M. Scott, 1973 [1974]:

Author: Lindberg
Year: 1871
Title:
Source: Acta Soc. Sci. Fenn.
Author: Crosby, M. R. and others - REVISED
Year: 1999
Title: REVISED: accepted in a monograph, revision, or descriptive flora since 1963
Source: Checklist Mosses
Author: Stone & G. A. M. Scott
Year: 1973
Title:
Source: J. Bryol.
Author: Fife, A. J.
Year: 1982
Title: Taxonomic and nomenclatural observations on the Funariaceae. 1. ~Physcomitrium~, ~Physcomitrella~, and ~Goniomitrium~ in New Zealand
Source: Lindbergia
Author: Anderson, L. E., H. A. Crum & W. R. Buck
Year: 1990
Title: List of mosses of North America north of Mexico
Source: Bryologist