1.
Babenko VF, Parfinovych NV. Nonsymmetric approximations of classes of periodic functions by splines of defect 2 and Jackson-type inequalities. Ukr. Mat. Zhurn. [Internet]. 2009Nov.25 [cited 2024Apr.25];61(11):1443-54. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3113