@article{Larson1999,
author = {Larson, R.W. and Verma, S.},
title= {How children and adolescents spend time across the world: Work, play, and developmental opportunities},
year = {1999},
doi = {10.1037//0033-2909.125.6.701},
volume = {125},
number = {6},
pages = {701--736},
}