BROVARETS, A. ., CHOVNYUK, Y. ., KRAVCHYUK, V. ., & IVANOV, E. (2021). THE QUALITATIVE FRACTAL ANALYSIS OF LONG TERM TIME SERIES FOR AGRICULTURAL SOILS’ ELECTRICAL CONDUCTIVITY PARAMETERS: METHODS OF NONLINEAR DYNAMICS, THEORY OF CHAOS, PHASE TRAJECTORIES. APPLIED QUESTIONS OF MATHEMATICAL MODELLING, 4(2.2), 45-54. https://doi.org/10.32782/KNTU2618-0340/2021.4.2.2.4