Konstantinov, O. V. “Control of a Reservoir Partially Filled With Liquid Based on Gauss’s Principle of Least Constraint (deceleration Task)”. Bulletin of Taras Shevchenko National University of Kyiv. Physics and Mathematics, no. 1, Feb. 2019, pp. 86-89, https://doi.org/10.17721/1812-5409.2019/1.19.