Politansky, L., Politanskyi, R. and Lesynsky, V. 2017. A study of synchronization processes of nonlinear systems in the difference space of phase variables. Eastern-European Journal of Enterprise Technologies. 3, 4 (87) (Jun. 2017), 17–24. DOI:https://doi.org/10.15587/1729-4061.2017.103955.