Bojanov–Naidenov problem for differentiable functions and the Erdös problem for polynomials and splines von V. Kofanov

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Relationship between the Boyanov–Naydenov problem and Kolmogorov-type inequalities von V. Kofanov

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The current state and prospects of development of the expert service of Ukraine in the XXI century von A. V. Kofanov

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Local and quasi-local energy levels of electrons on the nanotube surface and in the quantum ring at magnetic field von A. M. Ermolaev, S. V. Kofanov, G. I. Rashba

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