Zhelnov OD. Whitney Interpolation Constants Bounded by 2 for k = 5, 6, 7. Ukr. Mat. Zhurn. [Internet]. 2003 Apr. 25 [cited 2025 Dec. 5];55(4):546-9. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/3928