Chironomidae exuviae : a key to pupal exuviae of the West Palaearctic Region [electronic resource] / [P.H. Langton, H. Visser]. - Macintosh & Windows version 1.0. - Amsterdam : ETI Expert Center for Taxonomic Identification, University of Amsterdam, 2003. - 1 compact disc (CD-ROM) ; 12 cm. + [18] p. booklet. - (World biodiversity database CD-ROM series). - ISBN 90-75000-50-2[MFN: 4253]