Gillespie, D., Berggren , P., Brown , S., Kuklik , I. ., Lacey , C., Lewis , T., Matthews , J., McLanaghan , R., Moscrop , A., & Tregenza , N. (2023). Relative abundance of harbour porpoises (Phocoena phocoena) from acoustic and visual surveys of the Baltic Sea and adjacent waters during 2001 and 2002. J. Cetacean Res. Manage., 7(1), 51–57. https://doi.org/10.47536/jcrm.v7i1.757