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Bartosiewicz, Z.; Kotta, Ülle; Mullari, T.; Tõnso, M.; Pawluszewicz, E.; Wyrwas, M. Nabla Derivatives Associated With Nonlinear Control Systems on Homogeneous Time Scales. NAMC 2016, 21 (4), 547-563. https://doi.org/10.15388/NA.2016.4.8.