Reindl, Andrzej, et al. “Hexabromocyclododecane Contamination of Herring Gulls in the Coastal Area of the Southern Baltic Sea”. Oceanological and Hydrobiological Studies, vol. 49, no. 2, June 2020, pp. 147-56, https://czasopisma.bg.ug.edu.pl/index.php/oandhs/article/view/7770.