Biblio
“Productivity of soybean cultivars and their effect on soil fertility”, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 4, pp. 91-94, 1995.
, “Effect of fertilization and planting density on the productivity of maize hybrids grown under water stress. ”, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 36, pp. 67-71, 1991.
, “Photosynthetic productivity in a ribbon sowing of maize and soybean”, Higher Institute of Agriculture – Plovdiv, Scientific Works, vol. 36, pp. 73-79, 1991.
,