Айсагалиев C. А., and И. В. Севрюгин. “ Controllability and High-Speed Performance of Processes Described by Ordinary Dierential Equations”. Journal of Mathematics, Mechanics and Computer Science, vol. 81, no. 2, Mar. 2014, pp. 20-37, https://bm.kaznu.kz/index.php/kaznu/article/view/53.