@article{ref1,
title="Exploring the validity of the internet addiction test for students in grades 5-9 in Hong Kong",
journal="International journal of adolescence and youth",
year="2007",
author="Ngai, Steven Sek-Yum",
volume="13",
number="3",
pages="221-237",
abstract="[Abstract unavailable]  <p>Language: en</p>",
language="en",
issn="0267-3843",
doi="",
url="http://dx.doi.org/"
}