@article{Johow2012,
author = {Johow, J. and Voland, E.},
title= {Conditional grandmother effects on age at marriage, age at first birth, and completed fertility of daughters and daughters-in-law in historical Krummhörn},
year = {2012},
doi = {10.1007/s12110-012-9147-7},
journal = {Human Nature},
volume = {23},
number = {3},
pages = {341--359},
}