- H. Aleksanyan, “Nonlinear approximation by renormalized trigonometric system”, J. Contemp. Mathemat. Anal., 47, № 2, 2012,
86 
- Holger Boche, Ullrich J. Mönich, “On the Behavior of the Threshold Operator for Bandlimited Functions”, J Fourier Anal Appl, 19, № 1, 2013,
1 - Serhii A. Stasyuk, “Best m-term trigonometric approximation of periodic functions of several variables from Nikol’skii–Besov classes for small smoothness”, Journal of Approximation Theory, 177, 2014,
1