Amalia, S., V. Ratnasari, and I. Zain. “Semiparametric Bivariate Probit Model Early Breastfeeding Initiation and Exclusive Breastfeeding”. Journal of the Indonesian Mathematical Society, vol. 31, no. 3, Aug. 2025, p. 1952, doi:10.22342/jims.v31i3.1952.