1. Risken, H., The Fokker-Planck equation. Methods of solution and applications, Berlin Heidelberg: Springer, 1989.
2. Stratonovich, R.L., Topics in the theory of random noise, New York: Gordon & Breach, 1963, vol. 1.
3. Malakhov, A.N., Kumulyantnyi analiz sluchainykh negaussovykh protsessov i ikh preobrazovanii (Cumulant analysis of random non-Gaussian processes and their transformations), Moscow: Sov. Radio, 1978.
4. Kramers, H.A., Physica A, 1940, vol. 7, p. 284.
5. Moyal, J.E.J., J. Roy. Statist. Soc. Ser. B 1949, vol. 11, p. 150.