N.R. Zaynalov, U.Kh. Narzullaev, A.N. Muhamadiev, I.R. Rahmatullaev, D. Qilichev, “Manipulating The Rotation Of Ms Excel Cells To Hide Information”, IJAST, vol. 29, no. 8s, pp. 2270 - 2273, May 2020.