@article{Heckhausen2010,
author = {Heckhausen, J. and Wrosch, C. and Schultz, R.},
title= {A Motivational Theory of Life-Span Development},
year = {2010},
doi = {10.1037/a0017668},
journal = {Psychological Review},
volume = {117},
pages = {32--60},
}