Approximation of the Besov classes of periodic functions of several variables in a space L q AS Romanyuk Ukrainian Mathematical Journal 43 (10), 1297-1306, 1991 | 57 | 1991 |

Best-term trigonometric approximations of Besov classes of periodic functions of several variables AS Romanyuk Izvestiya: Mathematics 67 (2), 265, 2003 | 55 | 2003 |

Best approximations and widths of classes of periodic functions of several variables AS Romanyuk Sbornik: Mathematics 199 (2), 253, 2008 | 29 | 2008 |

Approximation of classes of periodic functions in several variables AS Romanyuk Mathematical Notes 71 (1), 98-109, 2002 | 29* | 2002 |

Approximate Characteristics of the Classes of Periodic Functions of Many Variables AS Romanyuk Proc. of the Institute of Mathematics, Ukrainian National Academy of …, 2012 | 24 | 2012 |

The best trigonometric approximations and the Kolmogorov diameters of the Besov classes of functions of many variables AS Romanyuk Ukrainian Mathematical Journal 45 (5), 724-738, 1993 | 24 | 1993 |

Optical characterization of the AgInS2 nanocrystals synthesized in aqueous media under stoichiometric conditions L Borkovska, А Romanyuk, V Strelchuk, Y Polishchuk, V Kladko, ... Materials Science in Semiconductor Processing 37, 135-142, 2015 | 22 | 2015 |

Linear widths of the Besov classes of periodic functions of many variables. II AS Romanyuk Ukrainian Mathematical Journal 53 (6), 965-977, 2001 | 22 | 2001 |

Approximability of the classes of periodic functions of several variables by linear methods and best approximations AS Romanyuk Sbornik: Mathematics 195 (2), 237, 2004 | 20 | 2004 |

Diameters and best approximation of the classes B_{p,θ} ^{r}of periodic functions of several variablesAS Romanyuk Analysis Mathematica 37 (3), 181-213, 2011 | 19* | 2011 |

Linear widths of the Besov classes of periodic functions of many variables. I AS Romanyuk Ukrainian Mathematical Journal 53 (5), 744-761, 2001 | 17 | 2001 |

Best trigonometric approximations for some classes of periodic functions of several variables in the uniform metric AS Romanyuk Mathematical Notes 82 (1), 216-228, 2007 | 15 | 2007 |

Kolmogorov and trigonometric widths of the Besov classes of multivariate periodic functions AS Romanyuk Sbornik: Mathematics 197 (1), 69, 2006 | 15 | 2006 |

On Estimates of the Kolmogorov Widths of the Classes in the Space Lq AS Romanyuk Ukrainian Mathematical Journal 53 (7), 1189-1196, 2001 | 14 | 2001 |

Best trigonometric and bilinear approximations for the Besov classes of functions of many variables AS Romanyuk Ukrainian Mathematical Journal 47 (8), 1253-1270, 1995 | 14 | 1995 |

Asymptotic estimates for the best trigonometric and bilinear approximations of classes of functions of several variables AS Romanyuk, VS Romanyuk Ukr. Mat. Zh 62, 536-551, 2010 | 13 | 2010 |

Best trigonometric and bilinear approximations of functions of several variables from the classes B p, θ r· I AS Romanyuk Ukrainian Mathematical Journal 44 (11), 1411-1424, 1992 | 13 | 1992 |

Inequalities for Lp-norms of (ψ, β)-derivatives and Kolmogorov widths of the classes of functions of many variables L p β ψ AS Romanyuk Investigations in the Theory of Approximation of Functions, 92-105, 1987 | 13 | 1987 |

Bilinear and trigonometric approximations of the Besov classes of periodic functions of many variables AS Romanyuk Izv. Ros. Akad. Nauk, Ser. Mat 70, 69-98, 2006 | 12 | 2006 |

Trigonometric and orthoprojection widths of classes of periodic functions of many variables AS Romanyuk, VS Romanyuk Ukr. Mat. Zh 61, 1348-1366, 2009 | 11 | 2009 |