Allignol A., Schumacher M., Beyersmann J. (2011). Empirical Transition Matrix of Multi-State Models: The etm Package. Journal of Statistical Software, 38(4), 1-15. tools:::Rd_expr_doi("10.18637/jss.v038.i04")
Araújo A, Meira-Machado L, Roca-Pardiñas J (2014). TPmsm: Estimation of the Transition Probabilities in
3-State Models. Journal of Statistical Software, 62(4), 1-29. tools:::Rd_expr_doi("10.18637/jss.v062.i04")
Meira-Machado L., Roca-Pardiñas J. (2011). p3state.msm: Analyzing Survival Data from an Illness-Death Model. Journal of Statistical Software, 38(3), 1-18. tools:::Rd_expr_doi("10.18637/jss.v038.i03")