HalvorsenO. 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), pp. 33-39. doi: 10.7557/2.3.1.465.