de Rovetto, C., A. F. Ortiz, R. Zarama, and L. E. Bravo. “Acalculous Cholecystitis: Complication of Pediatric Systemic Lupus Erythematosus”. Colombia Medica, vol. 38, no. 1.Supl.1, Mar. 2007, pp. 19-23, doi:10.25100/cm.v38i1.Supl.1.483.