Measurement techniques of piezoelectric, dielectric and electrostatic oscillators - Part 4: Short-term frequency stability test methods (IEC 62884-4:2019); German version EN IEC 62884-4:2019
压电、介电和静电振荡器的测量技术.第4部分:短期频率稳定性试验方法(IEC 62884-4-2019);德文版EN IEC 62884-4:2019