@article{Skirbekk2004,
author = {Skirbekk, V. and Kohler, H.P. and Prskawetz, A. },
title= {Birth month, school graduation, and the timing of births and marriages},
year = {2004},
doi = {10.1353/dem.2004.0028},
journal = {Demography},
volume = {41},
number = {3},
pages = {547--568},
}