Agafonova, Ludmila, Aldis Jansons, and Sarmīte Rancāne. 2015. “EFFICIENCY OF CULTIVATION OF CEREAL - PAPILIONACEOUS MIXTURES IN ORGANIC FARMING CONDITIONS”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (August): 107-12. https://doi.org/10.17770/etr2009vol1.1085.