I. V. Pinto and  M. R. Sooriyarachchi,  Comparison of Methods of Estimation for Use in Goodness of Fit Tests for Binary Multilevel Models.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    March 2019, vol. 148(4). 68 - 73
    [viewed 19 October 2019]. Available from: https://publications.waset.org/pdf/10010201.