Twej, W. A. “Two-Dimensional Crystallization of Silica Nanospheres Using Coplanar DC Electric Field”. Iraqi Journal of Physics 7, no. 8 (December 30, 2009): 69–74. Accessed January 9, 2026. https://www.ijp.uobaghdad.edu.iq/index.php/physics/article/view/918.