Institution G. S. Rakovski National Defense Academy Bulgaria Continue reading G. S. Rakovski National Defense Academy
Institution Institute of Optical Materials and Technologies, Bulg. Academy of Sciences Bulgaria Continue reading Institute of Optical Materials and Technologies, Bulg. Academy of Sciences
Institution St. Cyril and St. Methodius University of Veliko Tarnovo Bulgaria Continue reading St. Cyril and St. Methodius University of Veliko Tarnovo
