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, PMID21622419, doi:10.3732/ajb.0900161
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, PMID20152915, doi:10.1016/j.ympev.2010.02.004
efloras.org
Smith Merrill, Gary L. (2007), «Polytrichum», in: Flora of North America Editorial Committee, eds. 1993+, Flora of North America, 27, New York & Oxford: Oxford University Press
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, PMID21622419, doi:10.3732/ajb.0900161
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, PMID20152915, doi:10.1016/j.ympev.2010.02.004
