@article{Fahrmeir1996,
author = {Fahrmeir, L. and Wagenpfeil, S.},
title= {Smoothing hazard functions and time-varying effects in discrete duration and competing risks models},
year = {1996},
doi = {10.1080/01621459.1996.10476726},
volume = {91},
number = {436},
pages = {1584--1594},
}