Lyakhovich , Leonid, et al. “DEVELOPMENT OF COMPUTATIONAL SCHEMES OF GENERALIZED KINEMATIC DEVICES THAT PRECISELY REGULATE THE NATURAL FREQUENCY SPECTRUM OF ELASTIC SYSTEMS WITH A FINITE NUMBER OF DEGREES OF MASS FREEDOM, IN WHICH THE DIRECTIONS OF MOTION ARE PARALLEL, BUT DO NOT LIE IN THE SAME PLANE: PART 1: THEORETICAL FOUNDATIONS”. International Journal for Computational Civil and Structural Engineering, vol. 19, no. 3, Sept. 2023, pp. 173-8, https://doi.org/10.22337/2587-9618-2023-19-3-173-183.