[1]
Vader, W., Hagedal Pedersen, B.S. and Lønning, S. 1986. Morphological differences between two closely related sea urchin species, Strongylocentrotus droebachiensis and S. pallidus, in northern Norway (Echinodermata, Echinoidea). Fauna norvegica. 7, (Dec. 1986), 10-14. DOI:https://doi.org/10.5324/fn.v7i0.6098.