3 literature references for Orthorrhynchidium planifrons Renauld & Cardot, 1909:

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: Noguchi, A.
Year: 1987
Title: Notulae bryologicae XIV
Source: J. Hattori Bot. Lab.
Author: Brotherus ex Iishiba
Year: 1929
Title:
Source: Cat. Mosses Japan