Opinion 536 Protection under the Plenary Powers of the generic names Hellula Guenee, 1854, and Udea Guenee, 1844 (Class Insecta, Order Lepidoptera)
Published in Opinions and declarations rendered by the International Commission on Zoological Nomenclature, in 1959, in volume 20, issue 3, pages 25-40
Date published:1959