Gravili, C., Pavesi, L., Boero, F. and Tendal, O.S. 2018.

A review of Paul Lassenius Kramp’s hydrozoan types (taxonomic status, location and condition of the material) and a biography of the Danish zoologist

. Zootaxa. 4407, 1 (Apr. 2018), 65–85. DOI:https://doi.org/10.11646/zootaxa.4407.1.4.