Kondja, Stévy Retonda, et al. “The Bélinga Iron Ore Deposit (~2.8 Ga), NE-Gabon: Reactualization and New Interpretations on Crests”. European Scientific Journal, ESJ, vol. 13, no. 24, Aug. 2017, p. 307, doi:10.19044/esj.2017.v13n24p307.