@article{Hoem2008,
author = {Hoem, J.M. and Kostova, D.},
title= {Early traces of the Second Demographic Transition in Bulgaria: A joint analysis of marital and non-marital union formation, 1960–2004},
year = {2008},
doi = {10.1080/00324720802313256},
journal = {Population Studies},
volume = {62},
number = {3},
pages = {259--271},
}