A. G. Katranov, “A certain property of the oscillating solutions of nonlinear second order equations”, Differ. Uravn., 11:11 (1975), 2092–2093
1972
2.
A. G. Katranov, “The asymptotic behavior of oscillating solutions of the equation $\ddot x+f(t,\,x)g(\dot x)=0$”, Differ. Uravn., 8:6 (1972), 1111–1115
3.
A. G. Katranov, “On the question of the asymptotic behavior of oscillatory solutions of a second order nonlinear differential equation”, Differ. Uravn., 8:5 (1972), 785–789
1971
4.
A. G. Katranov, “The zeros of the oscillatory solutions of the equation $x''+a(t)f(x)=0$”, Differ. Uravn., 7:5 (1971), 930–933