Rubiandini, R., Siregar, S., Suhascaryo, N. and Efrial, D. (2014) “The Effect of CaO and MgO as Expanding Additives to Improve Cement Isolation Strength under HPHT Exposure”, Journal of Engineering and Technological Sciences, 37(1), pp. 29-48. doi: 10.5614/itbj.eng.sci.2005.37.1.3.