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1969, Volume 5, Number 9  

Евгений Алексеевич Барбашин
 1547–1549
A qualitative investigation of potential systems
V. V. Nemytskii, Yu. V. Malyshev 		1550–1557
The periodic vibrations of nonlinear systems with resonance. I
Ya. V. Bykov, T. Chinkaraev 		1558–1574
The locally integrable periodic motions of a nonlinear transmission system
S. T. Zavalishchin 		1575–1582
The Cauchy problem for a second order linear equation with small parameter which degenerates in the limit to an equation with singular points
A. B. Zimin 		1583–1593
Solution in finite form of certain second order linear systems of ordinary differential equations
V. M. Merkis 		1594–1604
Some criteria for stability of motion
N. A. Karpievich 		1605–1613
The stability in the critical case of several pairs of pure imaginary roots for systems with aftereffect
V. A. Weber 		1614–1625
A Thomas–Fermi type equation
A. I. Kolosov, G. Ya. Lyubarskii 		1626–1634
Certain properties of linear differential operators
A. G. Terent'ev 		1635–1641
Existence theorems for singular integral equations with discontinuous operator
V. G. Ogandzhanyan 		1642–1651
A certain integral formula for the solution of ordinary differential equations
N. Z. Gabbasov, E. S. Chichkin 		1652–1662
Starke Lösung des allgemeinen Problems einer Kreisscheibe im Strahlungsfeld eines magnetischen Dipols
E. A. Ivanov, A. A. Pal'tsev 		1663–1675
The behavior at infinity of solutions of a certain mixed problem
T. I. Zelenyak 		1676–1689
Necessary conditions for operator quasianalyticity
V. G. Hryptun 		1690–1699
A second order nonselfadjoint differential operator on the half axis
G. M. Kesel'man 		1700–1714

Short Communications
On controllability in Banach spaces
A. B. Kurzhanskii 		1715–1718
A Ljapunov function for a certain class of self-regulation systems
B. N. Skachkov 		1719–1723
The completeness with respect to energy of systems of coordinate functions which one constructs by the method of $R$-functions
V. G. Klimenko, V. L. Rvachev 		1724–1726
 
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