SZABO, Attila T. 1981. “Wheatgrass Variability (Agropyron, Sect. Elytrigia) in a Native Collection from Transylvania. II. Agropyron Repens (L.) P. Beauv”. Notulae Botanicae Horti Agrobotanici Cluj-Napoca 11 (1), 61-68. https://doi.org/10.15835/nbha111352.