Pérez, M. V., A. Gonzáles Hadad, and J. Rubiano. “Xperience With the Pericardial Window for the Diagnosis of Precordial Lesions. Hospital Universitario Del Valle, 1983-1987”. Colombia Medica, vol. 19, no. 4, Dec. 1988, pp. 142-4, doi:10.25100/cm.v19i4.6232.