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<strong>Ibn AL- Haitham Journal For Pure and Applied Science</strong>, [S.l.], v. 27, n. 1, p. 154-160, apr. 2017.
ISSN 2521-3407.
Available at: &lt;<a href="http://jih.uobaghdad.edu.iq/index.php/j/article/view/373" target="_new">http://jih.uobaghdad.edu.iq/index.php/j/article/view/373</a>&gt;. Date accessed: 30 nov. 2019.