V. D. Zheljazkov and Nikolov, S.,
“ACCUMULATION OF CD, PB, CU, MN, AND ZN BY SYLIBUM MARIANUM L. GROWN ON POLLUTED SOILS”,
Acta Horticulturae, no. 426, pp. 297 - 308, 1996.
V. D. Zheljazkov and Nikolov, S.,
“Accumulation of Cd, Pb, Cu, Mn, and Zn by Sylibum marianum L. grown on polluted soils”,
Acta Hort. , vol. 426, pp. 297-308, 1996.
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.
G. A. Sanchez and Rondon, S. I.,
“Arthropods soil sampling in sweet potato fields in the Cañete Valley”,
International Potato Center Annual Report. International Potato Center, Lima, Peru, pp. 1-10, 1996.