Hartman, Karin L., Chen, Ing, van der Harst, Pieter A., Moura, Andre E., Jahnke, Marlene, Pilot, Malgorzata, Vilela, Raul, Hoelzel, A. Rus, "Kinship study reveals stable non-kin-based associations in a medium-sized delphinid", Behavioral Ecology and Sociobiology, 2023