"Hausmann (2001)" . . . "Hausmann (2001)" . . "2001"^^ . "Hausmann, A. 2001. The Geometrid Moths of Europe. Volume 1: Introduction. Archiearinae, Orthostixinae, Desmobathrinae, Alsophilinae, Geometrinae. Apollo Books, Stenstrup. 282 pp." . "2001"^^ .