Blackmore, D., J. Golenia, A. K. Prykarpatsky, and Ya. A. Prykarpatsky. 2013. “Invariant Measures for Discrete Dynamical Systems and Ergodic Properties of Generalized Boole-Type Transformations”. Ukrains’kyi Matematychnyi Zhurnal 65 (1), 44-57. https://umj.imath.kiev.ua/index.php/umj/article/view/2403.