Memon, M. R., N. Shaikh, T. Shaikh, A. Shah, and A. G. Shaikh. “IMPRESSION FAULTS USING IRREVERSIBLE HYDROCOLLOID IMPRESSION MATERIAL BY UNDERGRADUATE AND GRADUATE STUDENTS”. Pakistan Oral & Dental Journal, Vol. 39, no. 1, May 2019, pp. 106-9, http://www.podj.com.pk/index.php/podj/article/view/361.