Santoferrara, Luciana F., and Viviana A. Alder. “Morphological Variability, Spatial Distribution and Abundance of Helicostomella Species (Ciliophora: Tintinnina) in Relation to Environmental Factors (Argentine Shelf; 40-55°S)”. Scientia Marina 73, no. 4 (December 30, 2009): 701–716. Accessed April 25, 2024. https://scientiamarina.revistas.csic.es/index.php/scientiamarina/article/view/1095.