1. Calibrating functions of PH and SH waves in epicentral distances to 21°;Christoskov;Izv. Geofiz. Inst. Bulg. Akad. Nauk. (Sofia),1967
2. Calibrating functions of PV and PVs waves for the Eurasian Homogeneous Magnitude System;Christoskov;Bulg. Geophys. J,1978
3. Homogeneous magnitude system of the Eurasian continent;Christoskov;Tectonophysics,1978
4. Homogeneous magnitude system of the Eurasian continent: P waves;Christoskov;World Data Center A for Solid Earth Geophysics, Boulder, Rep. SE-18,1979
5. Calibrating function of PH wave for the Eurasian Homogeneous Magnitude System;Christoskov;Bulg. Geophys. J.,1981