3 literature references for Sematophyllum aptychoides W. R. Buck, 1982:

Author: Bridel
Year: 1803
Title:
Source: Muscol. Recent.
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: W. R. Buck
Year: 1982
Title:
Source: Contr. Univ. Michigan Herb.