Alignment of distributed oscillation systems in piezo motors / A. V. Azin, S. V. Rikkonen, S. V. Ponomarev, S. Kuznetsov // Journal of Physics: Conference Series. 2019. Vol. 1145. P. 012007 (1-8). URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000707198