Bondaruk, A.G., A.I. Denisov, P.E. Kurochkin, and R.Ya Samarsk, ii. "About the nature of modern movements of the Earth?s crust at the Krivoy Rog polygon (in Russian)." In In Contemporary movements of the Earth?s crust on geodynamic polygons, 67-73. Tashkent: Fan, 1972.