Bodor, Zs., and E. Németh. “Effect of Life Cycle on the Production of Mullein (Verbascum Phlomoides L.)”. International Journal of Horticultural Science 10, no. 1 (March 16, 2004): 123–125. Accessed August 15, 2022. https://ojs.lib.unideb.hu/IJHS/article/view/451.