Results:
1. Lecture Notes "Accretion Flows in Binary stars with compact object"  pdf
2. "Flickering of the Recurrent Nova TCrB",  Yankova et al., 2026, Bulg.Astron.J., 45, 85 link
3. data set:  Photometry of Mira (omicron Ceti) in B and V bands link to Zenodo
4. data set:  Photometry of the ultrashort binary GP Com in B and V bands  link to Zenodo
5.  "Is Mira B a low mass white dwarf?", Zamanov, Irincheva, Spassov, et al. 2026, MNRAS, 547, stag321 pdf
6. "High-resolution spectroscopy of the symbiotic star AX Per"  Stoyanov et al., 2026, ATel 17658 link 
7. ThAr spectrum of Rozhen ESpeRo spectrograph images
8. Lecture - Reduction of ESpeRo spectra pdf
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