@article{Czado2009,
author = {Czado, C. and Gneiting, T. and Held, L.},
title= {Predictive model assessment for count data},
year = {2009},
doi = {10.1111/j.1541-0420.2009.01191.x},
volume = {65},
number = {4},
pages = {1254--1261},
}