Red List of fish and lamprey species - Florin, Ann-Britt; Svensson, Mikael; Birzaks, Janis; Boedeker, Dieter; Chernova, Natalia; Ložys, Linas; Moritz, Timo; Pusch, Christian; Pūtys, Žilvinas; Skóra, Krzysztof; Svedäng, Henrik; Tylik, Konstantin; et al. (FI, 2013)