Software for semiparametric shared gamma and log-normal frailty models: An overview. - Katharina Hirsch; Andreas Wienke (Comput. Methods Programs Biomed., 2012)

Log-normal frailty models fitted as Poisson generalized linear mixed models. - Katharina Hirsch; Andreas Wienke; Oliver Kuss (Comput. Methods Programs Biomed., 2016)