Tervo , O. M., M. Louis, M.-H. S. Sinding, M. P. Heide-Jørgensen, and R. G. Hansen. “Possible Signs of Recovery of the Nearly Extirpated Spitsbergen Bowhead Whales: Calves Observed in East Greenland”. Polar Research, vol. 42, Jan. 2023, doi:10.33265/polar.v42.8809.