Kurniawan, F., V. . Yulianty Permanasari, M. Nadjib, and E. . Chandra Nugraha. “Hospitalization Costs and Duration for Preterm and Low Birth Weight Infants under National Health Insurance”. Jurnal Jaminan Kesehatan Nasional, vol. 5, no. 2, Dec. 2025, pp. 169-83, doi:10.53756/jjkn.v5i2.377.