Nguyen, T. P. D., Tran, T. T. H., and Nguyen, Q. T. “Effects of light intensity on the growth, photosynthesis and leaf microstructure of hydroponic cultivated spinach (Spinacia oleracea L.) under a combination of red and blue LEDs in house”. International Journal of Agricultural Technology 15, no. 1 (January 15, 2019): 75–90. accessed November 17, 2025. https://li04.tci-thaijo.org/index.php/IJAT/article/view/8150.