Notes on the Otiorhynchus Germar, 1824 complex (Coleoptera: Curculionidae). Taxonomy, ecology and distribution of Curculionoidea (Coleoptera: Polyphaga). Proceedings of a symposium (28 August, 1996, Florence, Italy). 20 International Congress of Entomology., Museo Regionale di Scienze Naturali, Torino, 1998: 1-294. Chapter pagination: 51-80. 59 [Zoological Record Volume 135]