https://www.diodes.hk/thermotonic-crystal-oscillator-tcxo-high-stability-of-temperature-compensated-quartz-oscillators/
Thermotonic Crystal Oscillator (TCXO): High Stability of Temperature-Compensated Quartz Oscillators...
crystal oscillatortcxohigh
https://www.dke.de/de/ueber-uns/dke-organisation-auftrag/dke-fachbereiche/dke-gremium?id=3001099&type=dke%7Cgremium
IEC/TC 49/WG 7 Quartz crystal controlled oscillators
quartz crystaliectcwgcontrolled