I. K. Swarjana, N. Chansatitporn, N. Suwannapong, P. Lapvongwatana, and K. Amnatsatsue, “Disparities in utilization of maternal health services in the rural areas of Indonesia: an analysis among provinces with low, middle, and high poverty rates”, J Public Hlth Dev, vol. 18, no. 3, pp. 49–63, Sep. 2020.