Raeder MB, Steen VM, Vollset SE, Bjelland I (August 2007). "Associations between cod liver oil use and symptoms of depression: the Hordaland Health Study". J Affect Disord. 101 (1–3): 245–9. doi:10.1016/j.jad.2006.11.006. PMID17184843.
Bays H E (19 March 2007). "Safety Considerations with Omega-3 Fatty Acid Therapy". The American Journal of Cardiology. 99 (6 (Supplement 1)): S35–S43. doi:10.1016/j.amjcard.2006.11.020. PMID17368277.
Raeder MB, Steen VM, Vollset SE, Bjelland I (August 2007). "Associations between cod liver oil use and symptoms of depression: the Hordaland Health Study". J Affect Disord. 101 (1–3): 245–9. doi:10.1016/j.jad.2006.11.006. PMID17184843.
Bays H E (19 March 2007). "Safety Considerations with Omega-3 Fatty Acid Therapy". The American Journal of Cardiology. 99 (6 (Supplement 1)): S35–S43. doi:10.1016/j.amjcard.2006.11.020. PMID17368277.