Kotaś, J.; Stasicka, Z (2000). "Chromium occurrence in the environment and methods of its speciation". Environmental Pollution107 (3): 263–283. doi:10.1016/S0269-7491(99)00168-2. PMID 15092973.
Gonzalez, A. R.; Ndung'u, K; Flegal, AR (2005). "Natural Occurrence of Hexavalent Chromium in the Aromas Red Sands Aquifer, California". Environmental Science and Technology39 (15): 5505–5511. Bibcode:2005EnST...39.5505G. doi:10.1021/es048835n. PMID 16124280.
ods.od.nih.gov
«Chromium». Office of Dietary Supplements, US National Institutes of Health. 2016. Ανακτήθηκε στις 26 Ιουνίου 2016.