Stéen, Margareta, and Carina Johansson. “Elaphostrongylus Spp. From Scandinavian Cervidae - a Scanning Electron Microscope Study (SEM)”. Rangifer 10, no. 1 (August 1, 1990): 39-46. Accessed August 4, 2020. https://septentrio.uit.no/index.php/rangifer/article/view/789.