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Fogelholm GM, Näveri HK, Kiilavuori KT, Härkönen MH (tháng 9 năm 1993). “Low-dose amino acid supplementation: no effects on serum human growth hormone and insulin in male weightlifters”. International Journal of Sport Nutrition. 3 (3): 290–7. doi:10.1123/ijsn.3.3.290. PMID8220394.
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Demura S, Yamada T, Yamaji S, Komatsu M, Morishita K (tháng 10 năm 2010). “The effect of L-ornithine hydrochloride ingestion on performance during incremental exhaustive ergometer bicycle exercise and ammonia metabolism during and after exercise”. European Journal of Clinical Nutrition. 64 (10): 1166–71. doi:10.1038/ejcn.2010.149. PMID20717126.
Fogelholm GM, Näveri HK, Kiilavuori KT, Härkönen MH (tháng 9 năm 1993). “Low-dose amino acid supplementation: no effects on serum human growth hormone and insulin in male weightlifters”. International Journal of Sport Nutrition. 3 (3): 290–7. doi:10.1123/ijsn.3.3.290. PMID8220394.
Chromiak JA, Antonio J (2002). “Use of amino acids as growth hormone-releasing agents by athletes”. Nutrition. 18 (7–8): 657–61. doi:10.1016/s0899-9007(02)00807-9. PMID12093449.
“Ornithine Biosynthesis”. School of Biological and Chemical Sciences, Queen Mary, University of London. Truy cập ngày 17 tháng 8 năm 2007. Chú thích journal cần |journal= (trợ giúp)