Gordon, C. A., Hood, A. R. and Ellis, J. R. (2016) “Descriptions and revised key to the eggcases of the skates (Rajiformes: Rajidae) and catsharks (Carcharhiniformes: Scyliorhinidae) of the British Isles”, Zootaxa. Auckland, New Zealand, 4150(3), pp. 255–280. doi: 10.11646/zootaxa.4150.3.2.