@article{Downey2001,
author = {Downey, D.B.},
title= {Number of siblings and intellectual development: The resource dilution explanation},
year = {2001},
doi = {10.1037/0003-066X.56.6-7.497},
journal = {American Psychologist},
volume = {56},
number = {6−7},
pages = {497−504},
}