Measurement techniques of piezoelectric, dielectric and electrostatic oscillators -- Part 4 : Short-term frequency stability test methods ((IEC 62884-4:2019) EN IEC 62884-4:2019) (english version)
Measurement techniques of piezoelectric, dielectric and electrostatic oscillators -- Part 1: Basic methods for the measurement (IEC 62884-1:2017) (english version)
