Shahinyan, S.; Kirakosyan, G. ON THE OPTIMAL STABILIZATION OF A DOUBLE MATHEMATICAL PENDULUM HAVING A MOVABLE SUSPENSION CENTER. Proc. YSU A: Phys. Math. Sci. 2011, 45 (3 (226), 31-39. https://doi.org/10.46991/PYSUA.2011.45.3.031.