1. Ya. E. Romm and G. A. Dzhanunts, “A computer method of varying piecewise polynomial approximation of functions and solutions to ordinary diffrential equations,” Cybern. System Anal., No. 3, 169–189 (2013).
2. B. P. Demidovich, I. A. Maron, and E. Z. Shuvalova, Numerical Analysis Methods: Approximation of Functions and Differential and Integral Equations (Lan’, St. Petersburg, 2010) [in Russian].
3. V. K. Dzyadyk, “On the application of linear methods for the approximation of solutions to ordinary differential and Hammerstein integral equations by polynomials,” Izv. Akad. Nauk SSSR, Ser. Mat. 34, 827–848 (1970).
4. A. P. Afanas’ev, S. M. Dzyuba, M. A. Kirichenko, and N. A. Rubanov, “Approximate analytical solution of systems of ordinary differential equations with a polynomial right-hand side,” Zh. Vychisl. Mat. Mat. Fiz. 53, 321–328 (2013).
5. A. P. Afanas’ev, S. M. Dzyuba, “Method for constructing approximate analytic solutions of differential equations with a polynomial right-hand side”, Comput. Math. Math. Phys. 55, 1665–1673 (2015).