Moreno Alfonso, J. C., A. Pérez Martínez, A. Y. Molina Caballero, N. Busto Aguirreurreta, C. Goñi-Orayen, F. J. Gil Sáenz, and L. Elcano Sarasibar. “Unusual Radiological Finding in Foreign Bodies Ingestion: Three Esophageal Coins”. Colombia Medica, vol. 52, no. 4, Dec. 2021, p. e5005016, doi:10.25100/cm.v52i4.5016.