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/.