Stramkale, Veneranda, K. Jukāma, A. Stalažs, Māra Vikmane, and U. Kondratovičs. 2005. “PHOSPHOROUS SEED COATING AFFECT TO GERMINATION, PHOTOSYNTHETIC PIGMENTS AND YIELD OF RAPE”. ENVIRONMENT. TECHNOLOGIES. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June): 119-27. https://doi.org/10.17770/etr2005vol1.2153.