MOHAMMED1, Aveen K.; 						KHALEEL1, Ali I.; 						AHMED2, , Nawzad N..
 New Modified Electrodes of Graphite paste with Nano Silicon dioxide For Determination of  Sildenafil citrate Drug.
<strong>Tikrit Journal of Pure Science</strong>, [S.l.], v. 24, n. 6, p. 57-64, oct. 2019.
ISSN 2415-1726.
Available at: &lt;<a href="http://tjps.tu.edu.iq/index.php/j/article/view/888" target="_new">http://tjps.tu.edu.iq/index.php/j/article/view/888</a>&gt;. Date accessed: 17 nov. 2019.
doi: <a href="http://dx.doi.org/10.25130/j.v24i6.888">http://dx.doi.org/10.25130/j.v24i6.888</a>.