Description of the lungworm Otostrongylus circumlitus (Railliet, 1899) de Bruyn, 1933 (Metastrongyloidea: Crenosomatidae) found in the heart of harbour seals from Sweden. (2012). Journal of Nematode Morphology and Systematics, 12(2), J. Nematode Morphol. Syst., 12 (2): 169-175 (2009). https://revistaselectronicas.ujaen.es/index.php/jnms/article/view/782