S. A. ben hamida, M. A. El Maroush, W. M. Mustfa, and S. . M. Esayah, “Evaluation of Retention for copy post in Endodontically treated teeth cemented by different types of cement for over-denture abutments ”, LJMR, vol. 12, no. 2, pp. 172–181, Dec. 2018, doi: 10.54361/.