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National Science Fund
http://www.nsfb.net/
Bulgarian Academy of Sciences
http://www.bas.bg/
Faculty of Physics, Sofia University
http://phys.uni-sofia.bg/
Institute of Astronomy and National Astronomical Observatory
http://www.astro.bas.bg/
Rozhen National Astronomical Observatory
http://nao-rozhen.org/
Astronomical Center, Shumen University “Episkop K. Preslavski”
http://astro.shu-bg.net/index1.htm