Dimitrov, M., Илиева-Стоянова, Х. Waterbirds of Bourgas Wetlands. Sofia - Moscow: Pensoft, 2005 160 p., fig. 954-642-236-3.
Dimitrov, M., Илиева-Стоянова, Х. Waterbirds of Bourgas Wetlands. Sofia - Moscow: Pensoft, 2005 160 p., fig. 954-642-236-3.
Dimitrov, M., Илиева-Стоянова, Х. (2005) Waterbirds of Bourgas Wetlands, Sofia - Moscow: Pensoft 160 p., fig. 954-642-236-3.
Dimitrov, M., & Илиева-Стоянова, Х. (2005). Waterbirds of Bourgas Wetlands. Results and Evaluation of the Monthly Waterbird Monitoring 1996-2002. Sofia - Moscow: Pensoft, 160 p., fig.
Dimitrov M, Илиева-Стоянова Х. Waterbirds of Bourgas Wetlands: Results and Evaluation of the Monthly Waterbird Monitoring 1996-2002. Sofia - Moscow: Pensoft; 2005. p. 160 p., fig. ISBN: 954-642-236-3.