2)- John V Monaco, Malka Gorfine, Li Hsu. General Semiparametric Shared Frailty Model: Estimation and Simulation with frailtySurv.Journal of statistical software. 2018, 86:
3)- Richard Beare, Bradley Lowekamp, Ziv Yaniv. Image Segmentation, Registration and Characterization in R with SimpleITK.Journal of statistical software. 2018, 86: