Bahrun, D., M. Nazir, and K. N. “Description of Renal Biopsy in Frequently Relapsing and Corticosteroid Non Responsive Nephrotic Syndrome in Childhood”. Paediatrica Indonesiana, Vol. 28, no. 9-10, July 2019, pp. 192-9, doi:10.14238/pi28.9-10.1988.192-9.