REFERENCES
- Drachev D. (2004) Bulgarian Journal of Agricultural Science, 10, 165–167.
- Drachev D., Nikolova V. (2004) Study on the quality of Oriental tobacco origins from different growing regions, Scientific conference “Stara Zagora 2004”, 3–4 June, (II), 1, 101–105.
- Gueorgiev S., Popova V. (1999) Biotechnol. & Biotechnol. Eq., 13(1) 61–65.
- Popova V., Georgiev S. (1998) Investigation on some functional dependencies between tobacco and tobacco smoke composition, Collection of reports from the Jubilee Scientific Session 50 years SUB—Plovdiv, 1, 469–471.
- Slavova Y., Drachev D. (2004) Improvement of variety zoning—market necessity for Oriental tobaccos, magazine Economics and Management of Agriculture, Sofia, 3, 19–24.
- Timov A., Veselinov M., Atanasov K. and Dimi-trov S. (1974) Oriental tobacco in Bulgaria, Bulgarian Academy of Sciences, Sofia, 42–46.