T. Wongwananuruk, P. Laokirkkiat, and J. Prechapanich, “Heterotopic Pregnancy Following Tuboplasty and Ovulation Induction by Clomiphene Citrate and Timed Intrauterine Insemination: Case Report”, Siriraj Med J, vol. 59, no. 6, pp. 311–313, Nov. 2007.