Songthamwat, M., S. Norsuwan, P. Napamadh, and S. Songthamwat. “Factors Associated With Post-Cesarean Pain”. The Clinical Academia, vol. 43, no. 5, Oct. 2019, pp. 163-70, https://he02.tci-thaijo.org/index.php/theclinicalacademia/article/view/206616.