Izdebska, Joanna N., et al. “Demodex Phocidi (Acariformes: Demodecidae) from Phoca Vitulina (Carnivora: Phocidae) – the Second Observation in the World and a Supplement to the Species Description”. Oceanological and Hydrobiological Studies, vol. 49, no. 1, Mar. 2020, pp. 49-55, https://czasopisma.bg.ug.edu.pl/index.php/oandhs/article/view/7752.