TY  - JOUR
TI  - Flexible regression models with cubic splines
AU  - Sylvain Durrleman
AU  - Richard M Simon
JO  - Statistics in Medicine
PY  - 1989
VL  - 8
IS  - 5
DO  - 10.1002/sim.4780080504
UR  - https://doi.org/10.1002/sim.4780080504
ER  -