Härkönen, T.; Heide-Jørgensen, M.-P. (). „Comparative life histories of East Atlantic and other harbour seal populations”. Ophelia. 32 (3): 211–235. doi:10.1080/00785236.1990.10422032. ISSN0078-5326.
Van Parijs, S.M.; Kovacs, K.M. (). „In-air and underwater vocalizations of eastern Canadian harbour seals, Phoca vitulina”. Canadian Journal of Zoology. 80 (7): 1173–1179. doi:10.1139/z02-088.
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Matthews, L. P.; Parks, S. E. (). „Source levels and call parameters of harbor seal breeding vocalizations near a terrestrial haulout ite in Glacier Bay National Park and Preserve”. The Journal of the Acoustical Society of America. 141 (3): EL274–EL280. Bibcode:2017ASAJ..141L.274M. doi:10.1121/1.4978299. PMID28372144.
Perry, E. A.; Renouf, D. (). „further studies of the role of harbour seal (Phoca vitulina) pup vocalizations in preventing separation of mother-pup pairs”. Canadian Journal of Zoology. 66 (4): 934–938. doi:10.1139/z88-138.
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Matthews, L. P.; Parks, S. E. (). „Source levels and call parameters of harbor seal breeding vocalizations near a terrestrial haulout ite in Glacier Bay National Park and Preserve”. The Journal of the Acoustical Society of America. 141 (3): EL274–EL280. Bibcode:2017ASAJ..141L.274M. doi:10.1121/1.4978299. PMID28372144.
Matthews, L. P.; Parks, S. E. (). „Source levels and call parameters of harbor seal breeding vocalizations near a terrestrial haulout ite in Glacier Bay National Park and Preserve”. The Journal of the Acoustical Society of America. 141 (3): EL274–EL280. Bibcode:2017ASAJ..141L.274M. doi:10.1121/1.4978299. PMID28372144.
Härkönen, T.; Heide-Jørgensen, M.-P. (). „Comparative life histories of East Atlantic and other harbour seal populations”. Ophelia. 32 (3): 211–235. doi:10.1080/00785236.1990.10422032. ISSN0078-5326.