1. Derevenskii, V. P. “Quadratic Equations Over Matrix Skew Series,” Russian Mathematics (Iz. VUZ) 58, No. 1, 14–25 (2014).
2. Kurosh, A. G. Higher Algebra (GIFML, Moscow, 1963) [in Russian].
3. Jacobson, N. Lie Algebras (Interscience Publishers, a Division of John Wiley and Sons, New York-London, 1962; Mir, Moscow, 1964).
4. Zaitsev, V. F. and Polyanin, A. D. Handbook of Nonlinear Partial Differential Equations (Fizmatlit, Moscow, 2001) [in Russian].
5. Derevenskii, V. P. “Integrabllity of Riccati Equation and Linear Homogeneous Second-Order Differential Equation,” Soviet Mathematics (Iz. VUZ) 31, No. 5, 43–52 (1987).