@article{ref1,
title="Basic Concepts and Issues in Investigations of Adolescent Problems",
journal="International journal of adolescence and youth",
year="1988",
author="Kohen-Raz, R.",
volume="1",
number="2",
pages="117-130",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0267-3843",
doi="",
url="http://dx.doi.org/"
}