Pollet, M., Persson, M., Bøggild, E. and Crossley, R. (2015) “A long-lasting taxonomic problem in European Sympycnus resolved, with the description of a new species and data on habitat preferences”, Zootaxa. Auckland, New Zealand, 4032(1), pp. 81–102. doi: 10.11646/zootaxa.4032.1.4.