V. D. Zheljazkov, Cantrell, C. L., Astatkie, T., and M. Ebelhar, W.,
“Productivity, Oil Content, and Composition of Two Spearmint Species in Mississippi”,
Agronomy Journal, vol. 102, no. 1, p. 129, 2010.
I. Dimitrov, Zheljazkov, V. D., and Zhalnov, I.,
“Productivity of soybean cultivars and their effect on soil fertility”,
Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 91-94, 1995.
V. D. Zheljazkov,
“Productivity and quality of coriander in heavy metal polluted areas”,
Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 363-373, 1995.
V. D. Zheljazkov, Terziisky, D., and Karageorgiev, S.,
“Pollen Morphology of Bulgarian Ocimum basilicum L. Populations”,
Journal of Herbs, Spices & Medicinal Plants, vol. 4, no. 3, pp. 71 - 76, 1997.
C. L. Cantrell, Zheljazkov, V. D., Osbrink, W. L. A., Castro, A., Maddox, V., Craker, L. E., and Astatkie, T.,
“Podophyllotoxin and essential oil profile of Juniperus and related species”,
Industrial Crops and Products, vol. 43, pp. 668-676, 2013.
C. L. Cantrell, Zheljazkov, V. D., Osbrink, W. L. A., Castro, A., Maddox, V., Craker, L. E., and Astatkie, T.,
“Podophyllotoxin and essential oil profile of Juniperus and related species”,
Industrial Crops and Products, vol. 43, pp. 668 - 676, 2013.
I. Dimitrov, Zheljazkov, V. D., Janchev, I., and Terziev, Z.,
“Photosynthetic productivity in a ribbon sowing of maize and soybean”,
Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 36, pp. 73-79, 1991.
V. D. Zheljazkov, Cantrell, C. L., Astatkie, T., and M. Ebelhar, W.,
“Peppermint Productivity and Oil Composition as a Function of Nitrogen, Growth Stage, and Harvest Time”,
Agronomy Journal, vol. 102, no. 1, p. 124, 2010.