Approximation by dilated averages and K-functionals, Canadian Journal of Mathematics, accepted on Dec. 10, 2008, with Z. Ditzian
Nearly monotone and nearly convex approximation by smooth splines in Lp, p>0, Journal of Approximation Theory, accepted on Feb. 5, 2008, with K. Kopotun and D. Leviatan
Nikol'skii inequalities for Lorentz spaces, Rocky Mountain Journal of Mathematics, accepted on Aug. 27, 2007, with Z. Ditzian
Constrained spline smoothing, SIAM Journal on Numerical Analysis, 46 (2008), no. 4,1985-1997, with K. Kopotun and D. Leviatan
Ul'yanov-type inequality for bounded convex sets in Rd, Journal of Approximation Theory, 151 (2008), no. 1, 60-85, with Z. Ditzian
Sharp Marchaud and converse inequalities in Orlicz spaces, Proceedings of the American Mathematical Society, 135 (2007) 1115-1121, with Z. Ditzian
Nearly monotone spline approximation in Lp, Proceedings of the American Mathematical Society, 134 (2006) 2037-2047, with K. Kopotun and D. Leviatan
On 3-monotone approximation by piecewise polynomials, Journal of Approximation Theory, 133 (2005) 147-172, with D. Leviatan
Smoothing of 3-convex splines of 4-th degree with shape preservation, Ukrainian Mathematical Journal, 57 2 (2005) 277-283 [in Ukrainian]
Negative results in high-order shape preserving approximation, Matematicheskie Zametki, 76 6 (2004) 812-823 [in Russian], translated in Mathematical Notes, 76 6 (2004) 758-769, with A. V. Bondarenko
Convex multivariate approximation by algebras of continuous functions, Proceedings of International Conference "Advances in Constructive Approximation" (USA), 2004, 123-131, with A. V. Bondarenko
Three-convex approximation by quadratic splines with arbitrary fixed knots, East Journal on Approximations, 8 2 (2002) 185-196