@article{Fenge2010,
author = {Fenge, R. and von Weizsäcker, J.},
title= {Mixing Bismarck and child pension systems: An optimum taxation approach},
year = {2010},
doi = {10.1007/s00148-008-0236-1},
journal = {Journal of Population Economics},
volume = {23},
number = {2},
pages = {805--823},
}