COLE, Mary L.; HERBERT, David G. Seven new narrowly endemic species of Gulella Pfeiffer, 1856 from eastern South Africa (Gastropoda, Streptaxidae) and status revision for another. European Journal of Taxonomy, [S. l.], v. 900, n. 1, p. 1–31, 2023. DOI: 10.5852/ejt.2023.900.2299. Disponível em: https://ejt.sandbox.publicknowledgeproject.org/index.php/ejt/article/view/2299. Acesso em: 24 apr. 2026.