Karimzedah, G., et al. “Influence of Irrigation and Row Spacing on the Growth, Seed Yield and Active Substance of Milk Thistle (Silybum Marianum)”. International Journal of Horticultural Science, vol. 7, no. 3-4, Sept. 2001, pp. 78-81., https://doi.org/10.31421/IJHS/7/3-4/288.