REFERENCES
- Baker JG, Nowell J. 1854. A supplement to Baines' flora of Yorkshire, with a map. London: William Pamplin.
- Whitehouse HLK, Crundwell AC. 1991. Gymnostomum calcareum Nees & Homsch. and allied plants in Europe, North Africa and the Middle East. Journal of Buology 16: 561–579.
- Greven, HC. 1995. Grimmia Hedw. (Grinuniaceae, Musci) in Europe. Leiden: Backhuys.