Cronberg, N.; Natcheva, R. (2002). "Hybridization between the peat mosses, Sphagnum capillifolium and S. quinquefarium (Sphagnaceae, Bryophyta) as inferred by morphological characters and isozyme markers". Plant Systematics and Evolution. 234 (1): 53–70. Bibcode:2002PSyEv.234...53C. doi:10.1007/s00606-002-0196-y.
Cronberg, N.; Natcheva, R. (2002). "Hybridization between the peat mosses, Sphagnum capillifolium and S. quinquefarium (Sphagnaceae, Bryophyta) as inferred by morphological characters and isozyme markers". Plant Systematics and Evolution. 234 (1): 53–70. Bibcode:2002PSyEv.234...53C. doi:10.1007/s00606-002-0196-y.