Ballarin, F., P. Pantini, and M. Gobbi. “Elevation to Species Level and Redescription of Xysticus alpinus Kulczyński, 1887 Stat. N. (Araneae, Thomisidae)”. Zootaxa, vol. 4500, no. 2, Oct. 2018, pp. 271–280, doi:10.11646/zootaxa.4500.2.7.