Reznikoff, Paul & Goebel, Walther F.: The Use of Ferrous Gluconate in the Treatment of Hypochromic Anemia. Journal of Clinical Investigation, 1937, 16. vsk, nro 4, s. 547–554. PubMed:16694502. doi:10.1172/JCI100881. (englanniksi)
George A. Burdock: Encyclopedia of food and color additives, s. 1110–1111. CRC Press, 1997. ISBN 9780849394164. Kirja Googlen teoshaussa (viitattu 15.12.2020). (englanniksi)
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Reznikoff, Paul & Goebel, Walther F.: The Use of Ferrous Gluconate in the Treatment of Hypochromic Anemia. Journal of Clinical Investigation, 1937, 16. vsk, nro 4, s. 547–554. PubMed:16694502. doi:10.1172/JCI100881. (englanniksi)