@incollection{Dmytryshyn2026,
author    = {Romanyuk, A. and Pozharska, K. and Yanchenko, S.},
  title     = {Characteristics of linear and nonlinear approximation of classes of periodic functions of many variables in {L}ebesgue subspaces},
  booktitle = "Current trends in analys{\i}s, approximation theory and their
               applications",
  editor    = "Dmytryshyn, Roman",
    chapter   = {8},
  pages     = {236-276},
  publisher = "Selcuk University Press",
   year      =  2026,
   doi = {10.59726/SUPress/9789754482676},
  }