KirichenkoV. V., and PlakhotnykM. V. “Topological Conjugate Piecewise Linear Unimodal mappings of an Interval into Itself”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 68, no. 2, Feb. 2016, pp. 217-26, http://umj.imath.kiev.ua/index.php/umj/article/view/1835.