@book{Johnson-Hanks2011,
author = {Johnson-Hanks, J. and Bachrach, C.A. and Morgan, S.P. and Kohler, H.-P.},
title= {Understanding family change and variation},
year = {2011},
doi = {10.1007/978-94-007-1945-3},
address = {Dordrecht},
publisher = {Springer Netherlands},
}