V. A. Tikhonov, A. N. Volodina, S. V. Lanovetskii, O. K. Kosvintsev, “Issledovanie protsessa vosstanovleniya dioksida titana”, Molodezhnaya nauka Verkhnekamya, 1:5 (2008), 249–252
V. A. Tihonov, “On fields with $\nabla$-conjugate $m$-directions in a space with affine connection”, Izv. Vyssh. Uchebn. Zaved. Mat., 1987, no. 4, 71–75; Soviet Math. (Iz. VUZ), 31:4 (1987), 95–100
