JASSEM, Amjad Hussein.
 Effect of photo chemical etching and electro chemical etching on the topography of porous silicon wafers surfaces.
<strong>Tikrit Journal of Pure Science</strong>, [S.l.], v. 24, n. 4, p. 52-56, aug. 2019.
ISSN 2415-1726.
Available at: &lt;<a href="http://tjps.tu.edu.iq/index.php/j/article/view/845" target="_new">http://tjps.tu.edu.iq/index.php/j/article/view/845</a>&gt;. Date accessed: 14 aug. 2021.
doi: <a href="http://dx.doi.org/10.25130/j.v24i4.845">http://dx.doi.org/10.25130/j.v24i4.845</a>.