Jażdżewski, K., Grabowski, M. & Kupryjanowicz, J. (2014)

Further records of Amphipoda from Baltic Eocene amber with first evidence of prae-copulatory behaviour in a fossil amphipod and remarks on the taxonomic position of Palaeogammarus Zaddach, 1864

. Zootaxa, 3765 (5), 401–417.