Gaussian interval quadrature formula. - Borislav Bojanov; Petar Peynov Petrov (Numerische Mathematik, 2001)

Best One-Sided L1-Approximation by Blending Functions of Order (2, 2). - Dimiter Dryanov; Petar Peynov Petrov (J. Approx. Theory, 2002)

Uniqueness of the Gaussian interval quadrature formula. - Borislav Bojanov; Petar Peynov Petrov (Numerische Mathematik, 2003)

Gaussian Interval Quadrature Formulae for Tchebycheff Systems. - Borislav Bojanov; Petar Peynov Petrov (SIAM J. Numer. Anal., 2005)

Interpolation and L1-approximation by trigonometric polynomials and blending functions. - Dimiter Dryanov; Petar Peynov Petrov (J. Approx. Theory, 2012)