SZABO, Attila T. 1979. “Wheatgrass Variability (Agropyron, Sect. Elytrigia) in a Native Collection from Transylvania. II. Agropyron Repens”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 10 (1), 89-99. https://doi.org/10.15835/nbha101137.