Khayriev U, Nutfullaeva A, Barraeva S. The extremal function of the optimal quadrature formula with derivative: The extremal function of the optimal quadrature formula with derivative. mp [Internet]. 2024 Jun. 7 [cited 2024 Jul. 4];1(01). Available from: https://ojs.qarshidu.uz/index.php/mp/article/view/517