ROTAR, Ioan, Aurelia MOLDOVAN, Eugenia CHIRCA, and Alina SUTEU. “Mineral Nitrogen Effect Applied to the Lucerne Crop and the Factor Which Co-Operates to His Recover”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 23, no. 1 (August 5, 1993): 119–124. Accessed December 5, 2023. https://www.notulaebotanicae.ro/index.php/nbha/article/view/342.