Količestven analiz na ovcevădstvoto v bălgarskite zemi pod osmanska vlast ot sredata na XIX v. do Osvoboždenieto - Draganova, Slavka T. (Izdat. na Bălgarskata Akad. na Naukite, 1993)
PST: A quantitative analysis of sheep-breeding in Bulgarian lands under Ottoman domination from the middle of XIX c. to the Liberation. - In kyrill. Schr., bulg. - Zsfassung in engl. Sprache