Swarjana, I Ketut, Natkamol Chansatitporn, Nawarat Suwannapong, Punyarat Lapvongwatana, and Kwanjai Amnatsatsue. 2020. “Disparities in utilization of maternal health services in the rural areas of Indonesia: an analysis among provinces with low, middle, and high poverty rates”. Journal of Public Health and Development 18 (3). Bangkok, Thailand:49-63. https://he01.tci-thaijo.org/index.php/AIHD-MU/article/view/242574.