@article{Lutz2007,
author = {Lutz, W. and Skirbekk, V. and Testa, M.R. },
title= {The Low-Fertility Trap Hypothesis: Forces that May Lead to Further Postponement and Fewer Births in Europe},
year = {2007},
journal = {Vienna Yearbook of Population Research },
volume = {4},
pages = {167−192},
}