Yelameli, B. C., R. V. Neelannavar, and K. Das. “A Study of Risk Factors and Their Correlation With Severity of Retinopathy of Prematurity: A Prospective Study”. International Journal of Contemporary Pediatrics, vol. 7, no. 10, Sept. 2020, pp. 1984-90, doi:10.18203/2349-3291.ijcp20204039.