M. H. Ahmed and Z. S. Omran, “ EFFECT OF CuO NANOPARTICLES ON SEED GERMINATION AND SEEDLING GROWTH IN ECHINACEA PURPUREA IN VITRO”., Iraqi J. Agric. Sci., vol. 55, no. Special, pp. 34–42, Jan. 2024, doi: 10.36103/ijas.v55iSpecial.1883.