@article{Rammstedt2017,
author = {Rammstedt, B. and Martin, S. and Zabal, A. and Carstensen, C. and Schupp, J.},
title= {The PIAAC longitudinal study in Germany: Rationale and design},
year = {2017},
doi = {10.1186/s40536-017-0040-z},
volume = {5},
number = {4},
pages = {1--11},
}