N. Sunarti, W. D. Ningrum, and J. M. C. Ximenes, “Effectiveness of Nipple Puller in Flat Nipples among Postpartum Cesarean Section Mothers: A Case Study: Nina Sunarti, Wanda Diasti Ningrum, Joao Manuel Correia Ximenes ”, J. Persada Husada Indones., vol. 13, no. 1, pp. 43–51, Mar. 2026.