KOSEV, VALENTIN, and VILIANA VASILEVA. “Ecological Sustainability and Stability of Quantitative Signs in Vetch (Vicia Villosa) Varieties”. The Indian Journal of Agricultural Sciences 89, no. 7 (July 18, 2019): 1108–1114. Accessed July 23, 2026. https://epubs.icar.org.in/index.php/IJAgS/article/view/91652.