R. . Ramazanova, B. . Amirov, S. . Bazarbayev, O. . Zhandybayev, and S. . Tanirbergenov, “Effect of fertilizer application on watermelon yield in light sierozem soils: A mathematical modeling approach”, ijirss, vol. 8, no. 6, pp. 2315–2333, Sep. 2025.