L. Billings and E. M. Bollt, Chaos Solit. Fract. 12, 365 (2001), DOI: 10.1016/S0960-0779(99)00204-0 . E. Bollt, SIAM J. Appl. Dyn. Syst. 7, 341 (2008), DOI: 10.1137/070686111 . A. Boyarsky and P. Góra, Laws of Chaos (Birkhaüser, 1997). A. Boyarsky and P. Góra, J. Appl. Math. Stochast. Anal. 14, 257 (2001), DOI: 10.1155/S1048953301000211 . P. Góra, Colloquium Math. XLIX, 73 (1984). A. Lasota and M. C. Mackey, Chaos, Fractals, and Noise. Stochastic Aspects of Dynamics, Applied Mathematical Sciences 97 (Springer-Verlag, NY, 1994). A. Lasota and J. A. Yorke, Trans. Amer. Math. Soc. 186, 481 (1973), DOI: 10.1090/S0002-9947-1973-0335758-1 . F. Schweiger, J. Austral. Math. Soc. 34, 55 (1983), DOI: 10.1017/S1446788700019753