العبيد . . خ. إ. . ., هارون . . م. . ., and ناصر . . ه. . . “Development Analytical Method for the Determination of Hydroxurea (Hydrea) Based on the Dissociation of the Nickel-Chromium-Azrole-S Complex by Visible Spectrophotometer”. Tishreen University Journal -Basic Sciences Series, vol. 44, no. 1, Mar. 2022, pp. 33-51, https://journal.tishreen.edu.sy/index.php/bassnc/article/view/12082.