Serģe, I., G. Biteniece, G. Teliševa, G. Ļebedeva, and A. Lielpētere. “Application of Lignosilicon and Azobacterine for Biological Agriculture”.
ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June 26, 2006): 238–243. Accessed April 15, 2025.
https://journals23.rta.lv/index.php/ETR/article/view/2012.