A. Margina, Zheljazkov, V. D., and Kovatcheva, N.,
“Fungus diseases on essential oil and medicinal plants.”,
Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 395-362, 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.
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.
A. Margina and Zheljazkov, V. D.,
“Study on economically important diseases in valerian”,
Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 273-277, 1995.