Khairullah, M. , Lin, H. , Hanea, R. , Heemink, A.. "Parallelization of Ensemble Kalman Filter (EnKF) for Oil Reservoirs with Time-lapse Seismic Data". World Academy of Science, Engineering and Technology, Open Science Index 79, International Journal of Mathematical and Computational Sciences (2013), 7(7), 1076 - 1084.