@article{Billari2009,
author = {Billari, F.C.D. and Philipov, D. and Testa, M.},
title= {Attitudes, norms and perceived behavioural control: explaining fertility intentions in Bulgaria},
year = {2009},
doi = {10.1007/s10680-009-9187-9},
journal = {European Journal of Population},
volume = {25},
number = {4},
pages = {439--465},
}