Vilde, A., S. Cesnieks, and A. Rucins. 2006. “ENERGETICAL, ECONOMICAL AND ECOLOGICAL ASPECTS OF SOIL TILLAGE MINIMISATION”.
ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference 1 (June): 294-99.
https://doi.org/10.17770/etr2003vol1.2023.