@inbook{Heady2010,
author = {Heady, P. and Gruber, S. and Bircan, T.},
title= {The quantitative background},
year = {2010},
editor = {Heady, P.},
editor = {Schweitzer, P. },
booktitle = {Family, kinship and state in contemporary Europe},
address = {Frankfurt},
publisher = {Campus Verlag},
pages = {61‒90},
}