To cite parfm in publications use:
Munda M, Rotolo F, Legrand C (2012). “parfm: Parametric Frailty Models in R.” Journal of Statistical Software, 51(11), 1–20. https://www.jstatsoft.org/v51/i11/.
Corresponding BibTeX entry:
@Article{, title = {{parfm}: Parametric Frailty Models in {R}}, author = {Marco Munda and Federico Rotolo and Catherine Legrand}, journal = {Journal of Statistical Software}, year = {2012}, volume = {51}, number = {11}, pages = {1--20}, url = {https://www.jstatsoft.org/v51/i11/}, }