Gilles, A., T. Gunnlaugsson, B. Mikkelsen, D. G. Pike, and G. Víkingsson. “Summer Abundance of Harbour Porpoises (Phocoena Phocoena) in the Coastal Waters of Iceland and the Faroe Islands”. NAMMCO Scientific Publications, vol. 11, Aug. 2020, doi:10.7557/3.4939.