Blackmore, D. L., Prykarpatsky, Y. A., Samoilenko, A. M., & Prykarpatsky, A. K. (2005). The ergodic measures related with nonautonomous hamiltonian systems and their homology structure. Part 1. CUBO, A Mathematical Journal, 7(3), 49–63. Retrieved from https://cubo.ufro.cl/index.php/cubo/article/view/1535