@article{MOMA_1980__89_177961,
     author = {S.P. Wang},
     title = {On {Density} {Properties} of {Certain} {Subgroups} with {Boundedness} {Conditions.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {141--162},
     publisher = {mathdoc},
     volume = {89},
     year = {1980},
     zbl = {0421.22004},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1980__89_177961/}
}