@article{Madkour2010,
author = {Madkour, A.S. and Farhat, T. and Halpern, C.T. and Godeau, E. and Gabhainn, S.N.},
title= {Early adolescent sexual initiation as a problem behavior: A comparative study of five nations},
year = {2010},
doi = {10.1016/j.jadohealth.2010.02.008},
volume = {47},
number = {4},
pages = {389--398},
}