@article{Virtanen2011,
author = {Virtanen, P. and Lipiäinen, L. and Hammarström, A. and Janlert, U. and Saloniemi, A. and Nummi, T.},
title= {Tracks of labour market attachment in early middle age: A trajectory analysis over 12 years},
year = {2011},
doi = {10.1016/j.alcr.2011.03.001},
journal = {Advances in Life Course Research},
volume = {16},
number = {2},
pages = {55--64},
}