On orthogonal polynomials with respect to certain discrete Sobolev inner product F Marcellan, RX Zejnullahu, BX Fejzullahu, EJ Huertas Pacific J. Math 257, 167-188, 2012 | 18 | 2012 |

Orthogonal polynomials with respect to the Laguerre measure perturbed by the canonical transformations BX Fejzullahu, RX Zejnullahu Integral Transforms and Special Functions 21 (8), 569-580, 2010 | 15 | 2010 |

Some properties of the interpolating spline-functions space R Zejnullahu Matematički Vesnik 41 (107), 269-271, 1989 | 1 | 1989 |

The Approximation of Bivariate Blending Variant Szász Operators Based Brenke Type Polynomials B Baxhaku, R Zejnullahu, A Berisha Advances in Mathematical Physics 2018, 2018 | | 2018 |

The null space dimension and the existence of the interpolating spline-function in Banach space R Zejnullahu Le Matematiche 61 (2), 331-334, 2006 | | 2006 |

ON THE INTERPOLATING SPLINE-FUNCTION IN HILBERT SPACES R Zejnullahu Punime Matematike 1, 1986 | | 1986 |

Lebesgue Constants for Fourier Expansions Associated with Weight Function BX Fejzullahu, RX Zejnullahu | | |