Ahmed, M. R., Shahzad, R. and Sandhu, I. N. (2016) “Effects of Maintaining Apical Patency on Post-Operative Pain in Molars with Necrotic Pulp and Apical Periodontitis”, Annals of Punjab Medical College, 12(1), pp. 59-61. doi: 10.29054/apmc/2018.163.