PUIA, Ioan, Attila T. SZABO, and Gh. ILLYES. “Variability of the Chlorophyll Content in White Clover (Trifolium Repens L.)”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 11, no. 1 (August 5, 1981): 9–15. Accessed December 5, 2022. https://www.notulaebotanicae.ro/index.php/nbha/article/view/141.