Gao, Wei, Dongxian He, Jianfeng Zheng, and Yan Li. “Effects of Light Intensity and LED Spectrum on the Medicinal Component Accumulation of Hydroponic Hypericum Perforatum L. Under Controlled Environments”. International Journal of Agricultural and Biological Engineering 15, no. 5 (November 1, 2022): 63–69. Accessed December 26, 2025. https://ijabe.migration.pkpps03.publicknowledgeproject.org/index.php/ijabe/article/view/7373.