@article{Amster1974,
author = {Amster, L.E. and Krauss, H.H.},
title= {The relationship between life crises and mental deterioration in old age},
year = {1974},
doi = {10.2190/JA32-3VFR-29X4-D3Q7},
volume = {5},
number = {1},
pages = {51--55},
}