H. J. Wattimanela and  U. S. Passaribu and  N. T. Puspito and  S. W. Indratno,  Earthquake Classification in Molluca Collision Zone Using Conventional Statistical Methods.   journal   = {International Journal of Civil and Environmental Engineering}, [online]. World Academy of Science, Engineering and Technology.
    November 2014, vol. 96(12). 829 - 833
    [viewed 23 October 2019]. Available from: https://publications.waset.org/pdf/9999875.