Avdzhieva, Ana, and Geno Nikolov. “ASYMPTOTICALLY OPTIMAL QUADRATURE FORMULAE IN CERTAIN SOBOLEV CLASSES”. Ann. Sofia Univ. Fac. Math. and Inf. 102 (December 12, 2015): 145–169. Accessed January 15, 2025. https://admin.uni-sofia.bg/index.php/fmi/article/view/68.