A. KUMAR, S. M. .-U.-N. ANDRABI, R. K. TEWARI, S. K. MISHRA, and H. IFTEKHAR, “An In Vitro SEM Study on the Effectiveness of Smear Layer Removal of Four Different Irrigations”, Iran Endod J, vol. 7, no. 4, pp. 171–176, Oct. 2012.