- Boisseau, Oliver. 2014. Visual sightings from Song of the Whale 1993-2013. Provided by International Fund for Animal Welfare, Song of the Whale Team and downloaded from OBIS-SEAMAP on (access date), more
- D. Gillespie, P. Berggren, S. Brown, I. Kuklik, C. Lacey, T. Lewis, J. Matthews, R. Mclanaghan, A. Moscrop & N. Tregenza. 2005. Relative abundance of harbour porpoises (Phocoena phocoena). Journal of Cetacean Research and Managment: 7(1):51-57., more
- Baltic porpoise acoustic surveys 01-02, more
|
