Multivariate n-term rational and piecewise polynomial approximation. - Pencho Petrushev (J. Approx. Theory, 2003)

Nonlinear Approximation from Differentiable Piecewise Polynomials. - Oleg Davydov; Pencho Petrushev (SIAM J. Math. Anal., 2003)

Localized Tight Frames on Spheres. - Francis J. Narcowich; Pencho Petrushev; Joseph D. Ward (SIAM J. Math. Anal., 2006)

Multilevel preconditioning for partition of unity methods: some analytic concepts. - Wolfgang Dahmen; Shai Dekel; Pencho Petrushev (Numerische Mathematik, 2007)

The sixth Vasil Popov prize awarded to Joel A. Tropp of California Institute of Technology Thirteenth International Conference in Approximation Theory, San Antonio, Texas, March 8, 2010. - Pencho Petrushev (J. Approx. Theory, 2010)

Rational bases for spaces of holomorphic functions in the disc. - George Kyriazis; Pencho Petrushev (J. Lond. Math. Soc., 2014)

Fast memory efficient evaluation of spherical polynomials at scattered points. - Kamen G. Ivanov; Pencho Petrushev (Adv. Comput. Math., 2015)

"Ridge Functions" by Allan Pinkus. - Pencho Petrushev (J. Approx. Theory, 2016)

Highly effective stable evaluation of bandlimited functions on the sphere. - Kamen G. Ivanov; Pencho Petrushev (Numer. Algorithms, 2016)

In Memoriam: Blagovest Sendov February 8, 1932-January 19, 2020. - Kamen G. Ivanov; Pencho Petrushev (J. Approx. Theory, 2020)