Halvorsen, Odd, and K. Wissler. “Methods for estimating the density of Elaphostrongylus rangiferi Mitskevich (Nematoda, Metastrongyloidea) larvae in faeces from reindeer, Rangifer tarandus L”. Rangifer, vol. 3, no. 1, May 1983, pp. 33-39, doi:10.7557/2.3.1.465.