MUNTEAN, L. S., SALONTAI, A., CERNEA, S., BOTEZ, C., TAMAS, M., MORAR, G., VAIDA, F., VARBAN, D., & PARV, M. (1996). Research on the biology of Oenothera biennis L. species. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 26(1), 41–45. https://doi.org/10.15835/nbha261287