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@article{BUMI_2001_8_4B_2_a13, author = {De Falco, Maria}, title = {Groups with many nearly normal subgroups}, journal = {Bollettino della Unione matematica italiana}, pages = {531--540}, publisher = {mathdoc}, volume = {Ser. 8, 4B}, number = {2}, year = {2001}, zbl = {1147.20302}, mrnumber = {MR1832003}, language = {en}, url = {http://geodesic.mathdoc.fr/item/BUMI_2001_8_4B_2_a13/} }
De Falco, Maria. Groups with many nearly normal subgroups. Bollettino della Unione matematica italiana, Série 8, 4B (2001) no. 2, pp. 531-540. http://geodesic.mathdoc.fr/item/BUMI_2001_8_4B_2_a13/