1. On improved apparatus for microdistillation of rose flowers;Balinova;Rastenvievudni Nauki (Plant Science),1974
2. The effects of harvest date, fermentation duration and Tween 20 treatment on essential oil content and composition of industrial oil rose (Rosa damascena Mill.);Baydar;Industrial Crops and Products,2005
3. Koinov, V., 1968. Soil map of Bulgaria (western part). European Digital Archive of Soil Maps of the World, 2011). http://eusoils.jrc.ec.europa.eu/EuDASM/BG/BG_13001_01.jpg. Verified March, 2011.
4. Kovatcheva, N., Zheljazkov, V.D., Astatkie, T. Productivity, oil content, composition, and bioactivity of oil-bearing rose accessions. HortScience 46, 1-5.
5. Stabilization of liquid systems with surface active substances. 4. Solubilizing and extraction of lavandulae;Mihailova;Pharmazie,1966