Requested reference
Utochkin, A. S. (1989). [Systematic list of the spider genus Xysticus (Arachnida, Aranei, Thomisidae) of the USSR fauna]. In: Lange, A. B. (ed.) Fauna i Ekologiy Paukov i Skorpionov: Arakhnologicheskii Sbornik. Akademia Nauk SSSR, Moscow, pp. 14-16. -- Show included taxa