1. Electronic seismographs;Archangelski,1974
2. On the correction of the frequency response of a seismometric channel;Daragan;Izv. Akad. Nauk S.S.S.R.,1967
3. The sensitivity and dynamic range of inertial seismographs;Melton;Rev. Geophys. Space Phys.,1976
4. Theory of photoelectric feedback controlled seismographs;Plešinger;Geofyz. Sb.,1970
5. Synthesis of feedback controlled broad-band modifications of conventional seismograph systems;Plešinger;Z. Geophys.,1973