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Gomes, Celso de Sousa Figueiredo (2018). "Healing and edible clays: a review of basic concepts, benefits and risks". Environmental Geochemistry and Health. 40 (5): 1739–1765. doi:10.1007/s10653-016-9903-4. ISSN0269-4042. PMID28150053.
Gomes, Celso de Sousa Figueiredo (2018). "Healing and edible clays: a review of basic concepts, benefits and risks". Environmental Geochemistry and Health. 40 (5): 1739–1765. doi:10.1007/s10653-016-9903-4. ISSN0269-4042. PMID28150053.