(2025). Notes on IFS. Bulgarian Academy of Sciences, Prof. Marin Drinov" Publishing House.
Citazione stile Chigago Style (17a edizione)Notes on IFS. Bulgarian Academy of Sciences, Prof. Marin Drinov" Publishing House, 2025.
Citatione MLA (9a ed.)Notes on IFS. Bulgarian Academy of Sciences, Prof. Marin Drinov" Publishing House, 2025.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.