Halvorsen, Odd, and WisslerK. 1983. “Methods for Estimating the Density of Elaphostrongylus Rangiferi Mitskevich (Nematoda, Metastrongyloidea) Larvae in Faeces from Reindeer, Rangifer Tarandus L.”. Rangifer 3 (1), 33-39. https://doi.org/10.7557/2.3.1.465.