To cite the Inverse Gaussian and GL Type 1 shared frailty models with Generalized Weibull baseline:

Pandey A, Hanagal D, Tyagi S (2022). “Shared Frailty Models Based on Cancer Data.” International Journal of Statistics and Reliability Engineering, 9(3), 461–474.

To cite the GL Type 2 and Gamma shared frailty models with Weibull baseline:

Pandey A, Tyagi S (2021). “Comparison of Multiplicative Frailty Models Under Weibull Baseline Distribution.” Lobachevskii Journal of Mathematics, 42(13), 3184–3195. doi:10.1134/S1995080222010140.

Corresponding BibTeX entries:

  @Article{,
    title = {Shared Frailty Models Based on Cancer Data},
    author = {Arvind Pandey and David D. Hanagal and Shikhar Tyagi},
    journal = {International Journal of Statistics and Reliability
      Engineering},
    year = {2022},
    volume = {9},
    number = {3},
    pages = {461--474},
  }

  @Article{,
    title = {Comparison of Multiplicative Frailty Models Under Weibull
      Baseline Distribution},
    author = {Arvind Pandey and Shikhar Tyagi},
    journal = {Lobachevskii Journal of Mathematics},
    year = {2021},
    volume = {42},
    number = {13},
    pages = {3184--3195},
    doi = {10.1134/S1995080222010140},
  }