Fredga , K., Jaarola , M., Anker Ims , R., Steen , H. and G. Yoccoz , N. (1990) “The ’common vole’ in Svalbard identified as Microtus epiroticus by chromosome analysis”, Polar Research, 8(2), pp. 283-290. doi: 10.3402/polar.v8i2.6818.