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In 1971 Onnewer and Waterman establish sufficient condition which guaranteesuniform convergence of Vilenkin-Fourier series of continuous function. In thepaper we consider different classes of functions of generalized boundedoscilation and in the terms of these classes there are established sufficientconditions for uniform convergence of Ces\'aro means of negative order.

On the convergence of Ces\'aro means of negative order of Vilenkin-Fourier series