Prophet, M. P., & Shevchuk, I. A. (2012). Shape-preserving projections in low-dimensional settings and the <i>q </i&gt;-monotone case. Ukrains’kyi Matematychnyi Zhurnal, 64(5), 674-684. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/2607