Shulika, B., Porvan, A., Vysotska, O., Nekos, A. and Zhemerov, A. 2017. Control over grape yield in the north-eastern region of Ukraine using mathematical modeling. Eastern-European Journal of Enterprise Technologies. 2, 3 (86) (Apr. 2017), 51–59. DOI:https://doi.org/10.15587/1729-4061.2017.97969.