For citations:
Pankratov I.A., Sapunkov Ya.G., Chelnokov Yu.N. Quaternion Models and Algorithms of Solving the General Problem of Energetically Optimal Spacecraft Orbit Reorientation. Mekhatronika, Avtomatizatsiya, Upravlenie. 2019;20(8):498-503. https://doi.org/10.17587/mau.20.498-503