Chirdchim, W., P. Wanichsetakul, and J. Patumanond. “Aesthetic Outcomes of Intra-Umbilical Incision Vs Infra-Umbilical Incision in Postpartum Tubal Sterilization: A Randomized Controlled Trial”. Ramathibodi Medical Journal, vol. 42, no. 1, Mar. 2019, pp. 1-9, doi:10.33165/rmj.2019.42.1.109492.