@article{SEMR_2011_8_a3,
     author = {Ch. Li},
     title = {On $s$-semipermutable and weakly $s$-permutable subgroups},
     journal = {Sibirskie \`elektronnye matemati\v{c}eskie izvesti\^a},
     pages = {39--47},
     publisher = {mathdoc},
     volume = {8},
     year = {2011},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SEMR_2011_8_a3/}
}