Kireva, R., and V. Petrova. “Irrigation Scheduling аnd Irrigation Water Productivity of Vegetable Crops, Cultivated under Drip Irrigation”. Bulgarian Journal of Soil Science, Agrochemistry and Ecology 50, no. 3-4 (December 20, 2016): 30–36. Accessed September 13, 2026. https://agriacad.eu/ojs/index.php/bjssae/article/view/1982.