@article{Box-Steffensmeir2002,
author = {Box-Steffensmeir, J. and Zorn, C. },
title= {Duration Models for Repeated Events},
year = {2002},
doi = {10.1111/1468-2508.00163},
journal = {Journal of Politics },
volume = {64},
number = {4},
pages = {1069--1094},
}