Erik Vasseur:
Stronglyocentrotus Pallidus (G. O. Sars) and S. Droebachiensis (O. F. Müller). Distinguished by means of sperm-agglutination with egg-water and ordinary morphological characters.
Acta Borealia. A. Scientia. No 2.
Tromsø Museum 1951. 8vo. 16 s. Originalt omslag. Illustrert.