Cherif, K Mohamed Criticality of the reaction zone 9 of Oklo reactors revisited. [electronic resource] - Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine Jul 2019 - 165-173 p. digital Publication Type: Journal Article ISSN: 1872-9800 Standard No.: 10.1016/j.apradiso.2019.04.018 doi