Kumar, M., Sonker, P. K., Saroj, A., Jain, A., Bhattacharjee, A.,
& Saroj, R. K. (2020). Parametric survival analysis using R: Illustration with
lung cancer data. Cancer Reports, 3(4), e1210.
Khan, S. A. (2018). Exponentiated Weibull regression for time-to-event
data. Lifetime data analysis, 24(2), 328-354.