^J. Mann & A. S. Truswell (editors). Essentials of Human Nutrition (3rd edition, 2007). Oxford: Oxford University Press
^Yamada, Kazuhiro. Chapter 9. Cobalt: Its Role in Health and Disease. Astrid Sigel; Helmut Sigel; Roland K. O. Sigel (編). Interrelations between Essential Metal Ions and Human Diseases. Metal Ions in Life Sciences 13. Springer. 2013: 295–320. doi:10.1007/978-94-007-7500-8_9.
^Nielsen, Forrest H., Ultratrace Elements in Nutrition, Annual Review of Nutrition
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