DIFFERENTIAL-DIFFERENCE EQUATIONS ASSOCIATED WITH THE FRACTIONAL LAX OPERATORS Article Adler V.E., Postnikov V.V. Journal of Physics A: Mathematical and Theoretical. Vol. 44. 2011.
NEUTRAL AND CHARGED MATTER IN EQUILIBRIUM WITH BLACK HOLES Article Bronnikov K.A., Zaslavskii O.B. Physical Review D - Particles, Fields, Gravitation and Cosmology. Vol. 84. 2011.