1. Assessing conservation priorities for insects: status of water beetles in south Spain;Abellán;Biol. Conserv.,2005
2. Fauna insectorum balcanica;Apfelbeck,1894
3. Manual for the application of the AQEM system. A comprehensive method to assess European streams using benthic macroinvertebrates, developed for the purpose of the Water Framework Directive. Version1.0;AQEM Consortium,2002
4. Mosses and liverworts of Britain and Ireland - a field guide;Atherton,2010
5. La zonation des Plécoptères et des Coléoptères dans les cours d’eau des Pyrénées;Berthélemy;Gewässer und Abwässer,1964