Techasomboon, M., R. Wattanayingcharoenchai, J. M. Bartlett, and K. Aimjirakul. “Efficacy of Topical Ethyl Chloride Spray versus Subcutaneous 1% Lidocaine Injection in Reducing Pain from One Rod System Implant Insertion”. Thai Journal of Obstetrics and Gynaecology, vol. 25, no. 4, Dec. 2017, pp. 266-74, doi:10.14456/tjog.2017.35.