Wattson, A. & Parr, R. (1981), "Hormone implants affecting territory size and aggressive and sexual behaviour in red grouse", Ornis Scandinavica, 12 (1): 55–61, doi:10.2307/3675905, JSTOR3675905
Brodsky, L. M. (1988), "Mating tactics of male rock ptarmigan, Lagopus mutus: a conditional mating strategy", Animal Behaviour, 36 (2): 335–342, doi:10.1016/S0003-3472(88)80003-4, S2CID53162941
Holder, K. & Montgomerie, R. (1993), "Context and consequences of comb displays by male rock ptarmigan", Animal Behaviour, 45 (3): 457–470, doi:10.1006/anbe.1993.1057, S2CID54251015
Thomas, Vernon G.; Popko, Richard (1981-07-01). "Fat and protein reserves of wintering and prebreeding rock ptarmigan from south Hudson Bay". Canadian Journal of Zoology. 59 (7): 1205–1211. doi:10.1139/z81-172.
Mortensen, A.; Unander, S.; Kolstad, M.; Blix, A. S. (June 1983). "Seasonal Changes in Body Composition and Crop Content of Spitzbergen Ptarmigan Lagopus mutus hyperboreus". Ornis Scandinavica. 14 (2): 144. doi:10.2307/3676018. JSTOR3676018.
Mortensen, Atle; Blix, Arnoldus Schytte (March 1989). "Seasonal Changes in Energy Intake, Energy Expenditure, and Digestibility in Captive Svalbard Rock Ptarmigan and Norwegian Willow Ptarmigan". Ornis Scandinavica. 20 (1): 22. doi:10.2307/3676703. JSTOR3676703.
Stokkan, K. A. (1979), "Testosterone and daylength-dependent development of comb size and breeding plumage of male willow ptarmigan (Lagopus lagopus lagopus)", The Auk, 96 (1): 106–115, JSTOR4085405
Wattson, A. & Parr, R. (1981), "Hormone implants affecting territory size and aggressive and sexual behaviour in red grouse", Ornis Scandinavica, 12 (1): 55–61, doi:10.2307/3675905, JSTOR3675905
Mortensen, A.; Unander, S.; Kolstad, M.; Blix, A. S. (June 1983). "Seasonal Changes in Body Composition and Crop Content of Spitzbergen Ptarmigan Lagopus mutus hyperboreus". Ornis Scandinavica. 14 (2): 144. doi:10.2307/3676018. JSTOR3676018.
Mortensen, Atle; Blix, Arnoldus Schytte (March 1989). "Seasonal Changes in Energy Intake, Energy Expenditure, and Digestibility in Captive Svalbard Rock Ptarmigan and Norwegian Willow Ptarmigan". Ornis Scandinavica. 20 (1): 22. doi:10.2307/3676703. JSTOR3676703.
Brodsky, L. M. (1988), "Mating tactics of male rock ptarmigan, Lagopus mutus: a conditional mating strategy", Animal Behaviour, 36 (2): 335–342, doi:10.1016/S0003-3472(88)80003-4, S2CID53162941
Holder, K. & Montgomerie, R. (1993), "Context and consequences of comb displays by male rock ptarmigan", Animal Behaviour, 45 (3): 457–470, doi:10.1006/anbe.1993.1057, S2CID54251015