On trigonometric polynomials deviating least from zero on an interval. - Alexey Lukashov; Sergey Tyshkevich (J. Approx. Theory, 2013)

Estimates of Lebesgue constants for Lagrange interpolation processes by rational functions under mild restrictions to their fixed poles. - Sergei Kalmykov; Alexey Lukashov (J. Approx. Theory, 2023)