Mulatsih, S., A. Hariningrum, I. Purwanto, and R. Oktasari. “Implementing Yogyakarta Pediatric Cancer Registry for 16 Years”. Paediatrica Indonesiana, Vol. 59, no. 4, July 2019, pp. 188-94, https://paediatricaindonesiana.org/index.php/paediatrica-indonesiana/article/view/2164.