Zabolotna, A. V., O. I. Zabolotnyi, L. V. Rozborska, I. D. Zhilyak, and A. A. Datsenko. “PIGMENT CONTENT AND NET PHOTOSYNTHETIC PRODUCTIVITY OF MAIZE WHEN USING PLANT GROWTH REGULATORS”. Bulletin of Sumy National Agrarian University. The Series: Agronomy and Biology, Vol. 46, no. 4, May 2022, pp. 9-15, doi:10.32845/agrobio.2021.4.2.