KirichenkoV. V., and PlakhotnykM. V. 2016. “Topological Conjugate Piecewise Linear Unimodal mappings of an Interval into Itself”. Ukrains’kyi Matematychnyi Zhurnal 68 (2), 217-26. https://umj.imath.kiev.ua/index.php/umj/article/view/1835.