@article{MOMA_1971__75_177564,
     author = {Said Sidki},
     title = {Intersection of {Chains} of {Subgroups} of a {Finite} {Group.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {333--337},
     publisher = {mathdoc},
     volume = {75},
     year = {1971},
     zbl = {0232.20034},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1971__75_177564/}
}