Taxonomic Review of the Genus Yunnantettix (Orthoptera, Tetrigidae) from the Oriental Region von Yu. Storozhenko, T. I. Pushkar

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The First Record of Xya pfaendleri (Orthoptera, Tridactylidae) from Ukraine von T. I. Pushkar, Yu. Storozhenko

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On some types of propermutable subgroups and their generalizations in finite groups von O. O. Pypka, Yu. Storozhenko

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