Iriani, Y., T. Tambunan, and S. Sastroasmoro. “Cyclophosphamide in Frequent-Relapsing or Steroid-Dependent Nephrotic Syndrome: Review of 38 Patients”. Paediatrica Indonesiana, Vol. 45, no. 1, Oct. 2016, pp. 18-23, doi:10.14238/pi45.1.2005.18-23.