Stokkan, KA; Folkow, L; Dukes, J; Neveu, M; Hogg, C; Siefken, S; Dakin, SC; (2013) Shifting mirrors: adaptive changes in retinal reflections to winter darkness in Arctic reindeer. Proc Biol Sci B , 280 (1773) , Article 20132451. 10.1098/rspb.2013.2451. Green open access