Korobov, V.I. and Andriienko, T.V. 2023. Construction of controllability function as time of motion. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics. 97, (Jun. 2023), 13-24. DOI:https://doi.org/10.26565/2221-5646-2023-97-02.