@article{Berg2013,
author = {Berg, V. and Rotkirch, A. and Väisänen, H. and Jokela, M.},
title= {Personality is differentially associated with planned and non-planned pregnancies},
year = {2013},
doi = {10.1016/j.jrp.2013.01.010},
journal = {Journal of Research in Personality },
volume = {47},
number = {4},
pages = {296--305},
}