- Some estimates for convex polynomial approximation in $L_p$ (with Yingkang Hu and Xiang-Ming Yu)
- Approximation of Monotone Functions: A Counter Example (with Ronald A. DeVore and Igor A. Shevchuk)
- Nearly comonotone approximation (with Igor A. Shevchuk)
- On monotone and convex approximation by splines with free knots (with Aleksei Shadrin)
- Degree of simultaneous coconvex polynomial approximation (with K. Kopotun)
- Some positive results and counterexamples in comonotone approximation II (with Igor A. Shevchuk)
- Constants in comonotone polynomial approximation-- a survey (with Igor A. Shevchuk)
- Nearly comonotone approximation II (with Igor A. Shevchuk)
- More on comonotone polynomial approximation (with Igor A. Shevchuk)
- Interpolatory pointwise estimates for polynomial approximation (with Heinz H. Gonska, Igor A. Shevchuk and H.-Joerg Wenz)
- Shape-preserving approximation by polynomials
- Kolmogorov and linear widths of weighted Sobolev-type classes on a finite interval (with V. N. Konovalov)
- Kolmogorov and linear widths of weighted Sobolev-type classes on a finite interval II (with V. N. Konovalov)
- Estimates on the approximation of 3-monotone functions by 3-monotone quadratic splines (with V. N. Konovalov)
- Wavelet decompositions of non-refinable shift invariant spaces (with Shai Dekel)
- Shape-preserving widths of weighted Sobolev-type classes of positive, monotone, and convex functions on a finite interval (with V. N. Konovalov)
- Coconvex approximation (with Igor A. Shevchuk)
- Coconvex polynomial approximation (with Igor A. Shevchuk)
- On the relations between piecewise polynomial and rational approximation in $L_p(R^2)$ (with S. Dekel)
- On measuring the efficiency of kernel operators in $L_p(R^d)$ (with S. Dekel)
- Shape preserving widths of Sobolev-type classes of s-convex functions on a finite interval (with V. N. Konovalov)
- Free-knot splines approximation of s-monotone functions (with V. N. Konovalov)
- On bivariate smoothness spaces associated with nonlinear approximation (with S. Dekel and M. Sharir)
- The Bramble-Hilbert lemma for convex domains (with S. Dekel)
- Whitney estimates for convex domains with applications to multivariate piecewise polynomial approximation (with S. Dekel)
- Kolmogorov and linear widths of Sobolev-type classes of s-monotone functions (with J. Gilewicz and V. N. Konovalov)
- Widths of Sobolev-type classes with quasi-seminorms (with Z. Ditzian and V. N. Konovalov)
- Adaptive multivariate approximation using binary space partitions and geometric wavelets, (with S. Dekel)
- Simultaneous approximation by greedy algorithms (with V. N. Temlyakov)
- Simultaneous greedy approximation in Banach spaces (with V. N. Temlyakov)
- ``Convex approximation in the uniform norm: conclusion" (with K. Kopotun and I. A. Shevchuk)
- ``Coconvex approximation in the uniform norm: the final frontier" (with K. Kopotun and I. A. Shevchuk)
- ``On 3-monotone approximation by piecewise polynomials" (with A. V. Prymak)
- Approximation by polynomials and ridge functions of classes of s-monotone radial functions (with V. N. Konovalov and V. E. Maiorov)
- Approximation of Sobolev classes by polynomials and ridge functions (with V. N. Konovalov and V. E. Maiorov)
- ``Nikolskii-type estimates for coconvex approximation of functions with one inflection point" (with G. Dzyubenko and I. A. Shevchuk)
- ``Coconvex pointwise approximation" (with G. Dzyubenko and I. A. Shevchuk)
- ``Uniform and pointwise shape preserving approximation (SPA) by algebraic polynomials" (with K. Kopotun, A. Prymak and I. A. Shevchuk)
- ``The degree of shape preserving weighted polynomial approximation" (with Doron Lubinsky)
- ``Pointwise estimates for 3-monotone approximation" (with A. Bondarenko and A. Prymak)
- ``On 3-monotone approximation by piecewise polynomials" (with D. V. Radchenko and I. A. Shevchuk)
- ``65 years since the paper `On the value of the best approximation of functions having a real singular point' by I. I. Ibragimov" (with I. A. Shevchuk)
- ``On the stability and accuracy of least squares approximations" (with Albert Cohen and Mark A. Davenport)
- "Positive results and counterexamples in comonotone approximation II" (with I. A. Shevchuk and O. V. Vlasiuk)
- "New moduli of smoothness: weighted DT moduli revisited and applied" (with K. Kopotun and I. A. Shevchuk)
- "Monotone trigonometric approximation" (with Jean Sidon)
- "Constrained approximation with Jacobi weights" (with K. A. Kopotun and I. A. Shevchuk)
- "Jackson type estimates for piecewise q-monotone approximation, q\ge 3, are not valid" (with I. A. Shevchuk)
- "Yet another look at positive linear approximation operators, q-monotonicity and applications" (with K. Kopotun, A. Prymak and I. A. Shevchuk)
- "Comparing the degrees of unconstrained and shape preserving approximation by polynomials" (with I. A. Shevchuk)
- "A note on Hermite interpolation" (with A. Jakimovski)
- "On some properties of moduli of smoothness with Jacobi weights" (with K. Kopotun and I. A. Shevchuk)
- "Interpolatory estimates in monotone piecewise polynomial approximation" <\A> (with I. L. Petrova)
- "Interpolatory pointwise estimates in monotone polynomial approximation" (with K. Kopotun and I. A. Shevchuk)
- "On moduli of smoothness with Jacobi weights" (with K. Kopotun and I. A. Shevchuk)
- "On one estimate of divided differences and its applications" (with K. Kopotun and I. A. Shevchuk)
- "Interpolatory estimates for convex piecewise polynomial approximation" (with K. Kopotun and I. A. Shevchuk)
- "Uniform and pointwise shape preserving approximation (SPA) by algebraic polynomials: an update" (with K. Kopotun and I. A. Shevchuk)