On the theory of cluster sets of analytic functions On inequalities between the maxima of the absolute values of a function and its derivatives on a half-line On the zeros of some transcendental functions Homogeneous functions and their extensions Correlation theory of processes with random stationary $n$th increments On the structure of the regions of stability of linear canonical systems of differential equations with periodic coefficients Investigation of the behaviour of the integral curves of a system of two differential equations in the neighbourhood of a singular point On the theory of nonlinear differential equations of higher orders with a small parameter in the highest derivative On solutions of some differential equations of the second order depending upon a parameter On the solution of the problem of eigenvalues by the method of finite differences On difference approximations of the Laplace operator A method of finding a wide class of electrostatic and magnetic fields for which the solutions of the basic equation of electron optics are expressed by means of known functions