N.R. Zaynalov, U.Kh. Narzullaev, A.N. Muhamadiev, I.R. Rahmatullaev, D. Qilichev 2020. Manipulating The Rotation Of Ms Excel Cells To Hide Information. International Journal of Advanced Science and Technology. 29, 8s (May 2020), 2270 - 2273.