BabenkoV. V. and RudenkoA. A. (1996) “Optimization of quadratures on classes of functions given by differential operators with Real Spectra”, Ukrains’kyi Matematychnyi Zhurnal, 48(3), pp. 291-300. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/5326 (Accessed: 24November2024).