BULGARIAN JOURNAL OF AGRICULTURAL SCIENCE, vol.18, no.1, pp.42-48, 2012 (SCI-Expanded, Scopus)
KARASU, A., 2012.. Effect of nitrogen levels on grain yield and some attributes of some hybrid maize cultivars (Zea mays indentata Sturt.) grown for silage as second crop. Bulg. I Agric. Sci., 18: 42-48