doi.dx.org

Anchor text: Porsild, Morten P. (1918) On "Savssats": A crowding of Arctic animals at holes in the sea ice. Geographical Review 6 (3): 215-228.

Wikipedia: Morten Pedersen Porsild

Anchor text: Elton, C. (1946) Competition and the structure of ecological communities. Journal of Animal Ecology 15 (1): 54-68

Wikipedia: Alvar Palmgren