@article{Grünheid2011,
author = {Grünheid, E. and Scharein, M.G.},
title= {On developments in the mean joint lifetimes of three- and four-generation families in Western and Eastern Germany - a model calculation},
year = {2011},
doi = {10.4232/10.CPoS-2011-01en},
journal = {Comparative Population Studies},
number = {preprint},
}