1. A. N. Kolmogorov, Foundations of the Theory of Probability, Chelsea Publishing Company, New York (1956), 2nd ed.
2. M. A. Man’ko and V. I. Man’ko, J. Russ. Laser Res., 34, 203 (2013).
3. M. A. Man’ko, Phys. Scr., T153, 014045 (2013).
4. M. A. Man’ko and V. I. Man’ko, J. Phys.: Conf. Ser., 442, 012008 (2013).
5. M. A. Man’ko, V. I. Man’ko, G. Marmo, et al., Nuovo Cimento C, 36, 163 (2013).