To cite gems in publications use:
Blaser N, Salazar Vizcaya L, Estill J, Zahnd C, Kalesan B, Egger M, Keiser O, Gsponer T (2015). “gems: An R Package for Simulating from Disease Progression Models.” Journal of Statistical Software, 64(10), 1–22. http://www.jstatsoft.org/v64/i10/.
Corresponding BibTeX entry:
@Article{, title = {{gems}: An {R} Package for Simulating from Disease Progression Models}, author = {Nello Blaser and Luisa {Salazar Vizcaya} and Janne Estill and Cindy Zahnd and Bindu Kalesan and Matthias Egger and Olivia Keiser and Thomas Gsponer}, journal = {Journal of Statistical Software}, year = {2015}, volume = {64}, number = {10}, pages = {1--22}, url = {http://www.jstatsoft.org/v64/i10/}, }