Liu, Dong; Huang, Xianhe; Hu, Jianguo; Tang, Yuanlin; Wang, Yan: 'Measurement of quartz crystal unit parameters based on the precise derivation of zero phase frequency', Electronics Letters, 2017, 53, (3), p. 142-144, DOI: 10.1049/el.2016.4320
IET Digital Library, https://digital-library.theiet.org/;jsessionid=3icbgf8n5jeke.x-iet-live-01content/journals/10.1049/el.2016.4320