О. А. Єременко, В. В. Калитка, and С. М. Каленська, “Influence of growth regulator on plant growth, development and yield formation of sunflower hybrids (F<sub>1</sub>) under the conditions of Southern Steppe zone of Ukraine”, PVSandP, vol. 13, no. 2, pp. 141–149, Jun. 2017.