ICZN. (1959). Opinion 568. Protection under the plenary powers of the specific name "obtusa" Montagu, 1803, as published in the combination "Bulla obtusa" (class Gastropoda). Opinions and declarations rendered by the International Commission on Zoological Nomenclature. 20: 404-412.
Opinion 568. Protection under the plenary powers of the specific name "<i>obtusa</i>" Montagu, 1803, as published in the combination "<i>Bulla obtusa</i>" (class Gastropoda)
Opinions and declarations rendered by the International Commission on Zoological Nomenclature
