Istorija na bălgarskite zemi v drevnostta do kraja na III v. pr. Chr. - Fol, Aleksandăr N. 1933-2006 (Univ. Izdat. Sv. Kliment Ochridski, 1997)
PST: History of the Bulgarian lands in antiquity until the end of IIIrd c. B. C. - In kyrill. Schr., bulg.