Hutasoit, C., M. K. Dj., R. M. Daulay, H. M. Lubis, and Z. Siregar. “Bronchopneumonia With Measles in Infants and Children at the Department of Child Health School of Medicine, University of North Sumatera/ Dr. Pirngadi Hospital Medan (January 1985 - December 1989)”. Paediatrica Indonesiana, vol. 31, no. 9-10, Feb. 2019, pp. 273-80, doi:10.14238/pi31.9-10.1991.273-80.