@inbook{Keilman1995,
author = {Keilman, N.},
title= {Household concepts and household definitions in Western Europe: Different levels but similar trends in household developments},
year = {1995},
doi = {10.1007/978-1-4757-5424-7_5},
editor = {van Imhoff, E.},
editor = {Kuijsten, A.},
editor = {Hooimeijer, P.},
editor = {van Wissen, L. },
booktitle = {Household Demography and Household Modeling},
address = {New York},
publisher = {Springer},
}