“Evaluation of Gravimetric Method and Digital Image Analysis Method for Estimating Leaf Area of Tomato Plants (Solanum Lycopersicum Mill.)”. Bulgarian Journal of Soil Science, Agrochemistry and Ecology, vol. 55, no. 3-4, Dec. 2021, pp. 22-28, https://agriacad.eu/ojs/index.php/bjssae/article/view/1582.