Wahyuni, L., I. Mangunatmadja, R. Kaban, E. Rachmawati, M. Harini, B. Laksmitasari, A. Geraldyne, I. Sangwidjojo, D. Utami, V. Poernomo, and A. Sudjono. “Non-Nutritive Sucking Milestones of Preterm Infants in Indonesia: A Descriptive Study”. Paediatrica Indonesiana, Vol. 62, no. 5, Oct. 2022, pp. 311-7, doi:10.14238/pi62.5.2022.311-7.