1. Gutelius, M. F., Milican, F. K., Layman, E. M., Cohen, G. J., & Dublin, C. C. (1962). Nutritional studies of children with Pica. I Controlled study evalution nutritional status. Pediatrics, 29, 1012–1023.
2. Hartmann, A. S., Becker, A. E., Hampton, C., & Bryant-Waugh, R. (2012). Pica and rumination disorder in DSM-5. Psychiatric Annals, 42, 426–430.
3. Nchito, M., Geissler, P. W., Mubila, L., Friis, H., & Olsen, A. (2004). Effects of iron and mutimicronutrient supplementation on geophagy: a two-by-two factorial study among Zambian schoolchildren in Lusaka. Transactions of the Royal Society of Tropical Medicine and Hygiene, 98, 218–227.
4. Tack, J., Blondeau, K., Boecxstaens, V., & Rommel, N. (2011). Review article: The pathophysiology, differential diagnosis and management of rumination syndrome. Alimentary Pharmacology and Therapeutics, 33, 782–800.
5. Williams, D. E., & McAdams, D. (2012). Assessment, behavioral treatment, and prevention of pica: Clinical guidelines and recommendations for practitioners. Research in Developmental Disabilities, 33, 2050–2057.