(2025). Notes on IFS. Bulgarian Academy of Sciences, Prof. Marin Drinov" Publishing House.
Cita Chicago Style (17a ed.)Notes on IFS. Bulgarian Academy of Sciences, Prof. Marin Drinov" Publishing House, 2025.
Cita MLA (9a ed.)Notes on IFS. Bulgarian Academy of Sciences, Prof. Marin Drinov" Publishing House, 2025.
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