WASET
    Entisar A. Elgmati,  Dynamic Models versus Frailty Models for Recurrent Event Data.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2013, vol. 76(4). 605 - 609
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/734.