Bell, N. E.; Hyvonen, J. (2010), “A phylogenetic circumscription of Polytrichastrum (Polytrichaceae): Reassessment of sporophyte morphology supports molecular phylogeny”, American Journal of Botany, 97 (4): 566–78, doi:10.3732/ajb.0900161, PMID21622419
Bell, NE; Hyvönen, J (2010), “Phylogeny of the moss class Polytrichopsida (BRYOPHYTA): Generic-level structure and incongruent gene trees”, Molecular Phylogenetics & Evolution, 55 (2): 381–98, doi:10.1016/j.ympev.2010.02.004, PMID20152915
Bell, N. E.; Hyvonen, J. (2010), “A phylogenetic circumscription of Polytrichastrum (Polytrichaceae): Reassessment of sporophyte morphology supports molecular phylogeny”, American Journal of Botany, 97 (4): 566–78, doi:10.3732/ajb.0900161, PMID21622419
Bell, NE; Hyvönen, J (2010), “Phylogeny of the moss class Polytrichopsida (BRYOPHYTA): Generic-level structure and incongruent gene trees”, Molecular Phylogenetics & Evolution, 55 (2): 381–98, doi:10.1016/j.ympev.2010.02.004, PMID20152915
theplantlist.org
The Plant List (2010). “Polytrichum”. Truy cập ngày 10 tháng 6 năm 2014.