Tømmervik, Hans, et al. “Growing Season Changes in Fennoscandia and Kola Peninsula During the Period 1982 to 1999 - Implications for Reindeer Husbandry (In Norwegian With Summary in English)”. Rangifer, vol. 25, no. 3, Apr. 2005, pp. 89-98, https://doi.org/10.7557/2.25.3.1743.