Friedman, V. A.     "One" as an Indefinite Marker in Balkan and Non-Balkan Slavic [Текст] / V.A. Friedman // Macedonian studies 2 / Victor A. Friedman ; Maced. acad. of sciences and arts. — Скопjе : Macedonian academy of sciences and arts, 2015. — P. 129-163.