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BALLARD, Karen Ann; KOVACS, Kit M. The acoustic repertoire of hooded seals ( Cystophora cristata ). Canadian Journal of Zoology. 1995-07-01, roč. 73, čís. 7, s. 1362–1374. Dostupné online [cit. 2023-06-27]. ISSN0008-4301. doi:10.1139/z95-159. (anglicky)
BELLIDO, J. J.; CASTILLO, J. J.; FARFÁN, M. A. First records of hooded seals (Cystophora cristata) in the Mediterranean Sea. Marine Biodiversity Records. 2008-01, roč. 1, s. e74. Dostupné online [cit. 2023-06-28]. ISSN1755-2672. doi:10.1017/S1755267207007804. (anglicky)
BALLARD, Karen Ann; KOVACS, Kit M. The acoustic repertoire of hooded seals ( Cystophora cristata ). Canadian Journal of Zoology. 1995-07-01, roč. 73, čís. 7, s. 1362–1374. Dostupné online [cit. 2023-06-27]. ISSN0008-4301. doi:10.1139/z95-159. (anglicky)
JENNESS, R. The composition of human milk. Seminars in Perinatology. 1979-07, roč. 3, čís. 3, s. 225–239. PMID: 392766. Dostupné online [cit. 2023-06-28]. ISSN0146-0005. PMID392766. (anglicky)
FOLKOW, Lars P.; BLIX, Arnoldus Schytte. Diving behaviour of hooded seals (Cystophora cristata) in the Greenland and Norwegian Seas. Polar Biology. 1999-06-01, roč. 22, čís. 1, s. 61–74. Dostupné online [cit. 2023-06-27]. ISSN1432-2056. doi:10.1007/s003000050391. (anglicky)