V. D. Zheljazkov, Yankuloff, Y., Raev, R. Tsevtkov, Stanev, S., Margina, A., and Kovatcheva, N.,
“Achievements in breeding on medicinal and aromatic plants in Bulgaria”,
Beitrage zur Zuchtungsforschung , vol. 2, pp. 142-145, 1996.
V. D. Zheljazkov, Yankov, B., and Topalov, V.,
“Comparison of Three Methods of Mint Propagation and Their Effect on the Yield of Fresh Material and Essential Oil”,
Journal of Essential Oil Research, vol. 8, no. 1, pp. 35 - 45, 1996.
B. L. Goulart, Yang, W. Qiang, and Demchak, K.,
“Development of an Inoculation System for Studying Mycorrhizal Effects in Highbush Blueberry”,
Journal of Small Fruit & Viticulture, vol. 328244, no. 4, pp. 193 - 201, 1996.
W. Qiang Yang, Goulart, B. L., and Demchak, K.,
“The effect of aluminium and media on the growth of mycorrhizal and nonmycorrhizal highbush blueberry plantlets”,
Plant and Soil, vol. 1834871931651079110673685795843281710113242412027191128125?266124464102691117386, no. 2, pp. 301 - 308, 1996.
V. D. Zheljazkov, Yankov, B., and Topalov, V.,
“Effect of Mechanical and Chemical Weed Control on the Growth, Development and Productivity of Mentha piperita and M. arvensis var. piperascens Grown for Planting Material”,
Journal of Essential Oil Research, vol. 8, no. 2, pp. 171 - 176, 1996.