TY  - COMP
A1  - Therneau, T.M.
A1  - Lumley, T.
A1  - Halvorsen, K.
A1  - Hornik, K.
T1  - date: Functions for handling dates. R package
Y1  - 2012
UR  - http://cran.r-project.org/web/packages/date/index.html
N1  - (Accessed January 16, 2013); 1.2-33

ER  -