Forecasting the design maxima water discharges of floods on the Latorica river according to the data of the Mukachevo gauging station using plotting position formulas by Stefanyshyn, Dmytro V.

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On the non–periodic groups, whose subgroups of infinite special rank are transitively normal by Kurdachenko, L. A., Subbotin, I. Ya., Velychko, T. V.

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On groups whose subgroups of infinite special rank are transitively normal by Semko, Nicolai N., Velychko, Tatyana V.

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