Lohsirwat, V. ., A. . Trakarnsanga, T. . Akaraviputh, V. . Chinswangwatanakul, and D. . Lohsiriwat. “Mono- or Poly- Antimicrobial Prophylaxis in Colorectal Surgery”. The Thai Journal of Surgery, vol. 29, no. 3, July 2008, pp. 77-80, https://he02.tci-thaijo.org/index.php/ThaiJSurg/article/view/241033.