Danylchenko, Yu. M., V. Yu. Bojko, and A. I. Petryshyn. 2020. “Method of Gearbox State Estimation of the Metro Tunnel Escalator Drive”. Mechanics and Advanced Technologies, no. 2(89) (September). Kyiv, Ukraine. https://doi.org/10.20535/2521-1943.2020.89.202268.