TanashevaМaruan, Olga Ponomarenko, L. Beisembaeva, and M. Kalabaeva. “Development of Effective Methods for Determination of Boron in Soils and Soil Solutions”. Chemical Bulletin of Kazakh National University 68, no. 4 (December 4, 2012): 75-78. Accessed December 9, 2021. https://bulletin.chemistry.kz/index.php/kaznu/article/view/281.