@article{Härkönen2018,
author = {Härkönen, J. and Lindberg, M. and Karlsson, L. and Karlsson, H. and Scheinin, N.M.},
title= {Education is the strongest socioeconomic predictor of smoking in pregnancy},
year = {2018},
doi = {10.1111/add.14158},
volume = {113},
number = {6},
pages = {1117--1126},
}