BlattH. P., GrothmannR., and KovachevaR. K. “Sign Changes in Rational <i>L<sub>w</sub></i><sup>1</Sup&gt;-Approximation”. Ukrains’kyi Matematychnyi Zhurnal 58, no. 2 (February 25, 2006): 283–287. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3452.