On weakly s -normal subgroups of finite groups von Li, Yangming, Qiao, Shouhong

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On weakly s -normal subgroups of finite groups von Li, Yangming, Qiao, Shouhong, Лі, Янмін, Чяо, Шоухонг

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On ss-quasinormal and weakly s-supplemented subgroups of finite groups von Li, C., Li, Yangming, Лі, К., Лі, Янмін

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