Källersjö, M., T.v. Proschwitz, S. Lundberg, P. Eldanäs & C. Erséus. 2005. Evaluation of ITS rDNA as a complement to mitochondrial gene sequences for phylogenetic studies in freshwater mussels: an example using Unionidae from north-western Europe. Zoologica Scripta 34: 415-424. https://doi.org/10.1111/j.1463-6409.2005.00202.x.