1.
Russell DE, Martell AM. Winter ecology of the Porcupine caribou herd, Yukon: Part III, Role of day length in determining activity pattern and estimating percent lying. Ran [Internet]. 1986Jun.1 [cited 2019Dec.14];6(2):253-9. Available from: https://septentrio.uit.no/index.php/rangifer/article/view/656