1. Preliminary analysis of the Solar Cosmic Ray increase on September 29, 1989, based on neutron monitor data;Baysultanova,1990
2. Space radiation dosimetry with active detectors for the scientific program of the second Bulgarian cosmonaut on board the MIR space station;Dachev;Adv. Space. Res.,1989
3. Radiation control on the MIR station with display dosimeter;Markelov;Kosm. biol. aviakosm. med.,1982
4. Real time quality factor and dose equivalent meter “CIRCE” and its use on board the Soviet orbital station MIR;Nguyen,1989
5. Solar Geophysical Data No. 543,1990