@article{MAN_1988__282_2_164452,
     author = {Walter Roelcke and Martin Leischner},
     title = {On {Neutral} {Subgroups} of {Topological} {Groups.}},
     journal = {Mathematische Annalen},
     pages = {113--130},
     publisher = {mathdoc},
     volume = {282},
     number = {2},
     year = {1988},
     zbl = {0627.22005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1988__282_2_164452/}
}