STATIONARY DISTRIBUTION OF A FINITE QUEUE WITH A RECURRENT INPUT FLOW AND MARKOV SERVICING Статья Bocharov P.P. Avtomatika i Telemekhanika.
ON THE METHODS OF FINDING FIRST INTEGRALS IN APPLICATION TO THE SKYRME MODEL Статья Sanyuk V.I. Solitons and applications (Dubna, 1989). World Sci. Publ., River Edge, NJ. 1990. С. 425-428