@article{Kohler2011,
author = {Kohler, I.V. and Preston, S.H.},
title= {Ethnic and religious differentials in Bulgarian mortality, 1993–98},
year = {2011},
doi = {10.1080/00324728.2010.535554},
journal = {Population Studies},
volume = {65},
number = {1},
pages = {91−113},
}