Oliynyk, O., Taranenko, Y., Shvachka, A. and Chorna, O. 2017. Development of auto­oscillating system of vibration frequency sensors with mechanical resonator. Eastern-European Journal of Enterprise Technologies. 1, 2 (85) (Feb. 2017), 56–60. DOI:https://doi.org/10.15587/1729-4061.2017.93335.