Anker-Nilssen T., and Lorentsen S.-H. “Distribution of Puffins Fratercula Arctica Feeding off Røst, Northern Norway, During the Breeding Season, in Relation to Chick Growth, Prey and Oceanographical Parameters”. Polar Research, vol. 8, no. 1, Jan. 1990, pp. 67-76, doi:10.3402/polar.v8i1.6805.