Maxwell, Kate, and Giles N. Johnson. “Chlorophyll fluorescence—a Practical Guide”. Journal of Experimental Botany, vol. 51, no. 345, 2000, pp. 659-68, https://doi.org/10.1093/jexbot/51.345.659.
Maxwell, K., & Johnson, G. N. (2000). Chlorophyll fluorescence—a practical guide. Journal of Experimental Botany, 51(345), 659-668. https://doi.org/10.1093/jexbot/51.345.659
Maxwell K, Johnson GN. Chlorophyll fluorescence—a practical guide. Journal of Experimental Botany. 2000;51(345):659-68.