Bozilova, Elisaveta D B; Filipova, Mariana V F M (1986): Paleoecological environment in northeastern Black Sea area during Neolithic, Eneolithic and Bronze periods. Studia Praehistoria, 8, 160-165
Bozilova, Elisaveta D B; Lazarova, Maria A; Straszewska, K (1985): Geomorphological characteristics and development of the vegetation in the region of Srebarna Lake Bulgaria (in Bulgarian). Godishnik na Sofiiskiya Universitet Kliment Okhridski Biologicheski Fakulte, 79(2), 99-109