@article{GDZPPN00222187X,
title = {An Example of a Q-minimal Precompact Topological Group Containing a Nonminimal Closed Normal Subgroup.},
journal = {Manuscripta mathematica},
volume = {29},
year = {1979},
pages = {323-328},
zbl = {0403.22001},
url = {http://dml.mathdoc.fr/item/GDZPPN00222187X}
}
Schwanengel, Ulrich. An Example of a Q-minimal Precompact Topological Group Containing a Nonminimal Closed Normal Subgroup.. Manuscripta mathematica, Tome 29 (1979) pp. 323-328. http://gdmltest.u-ga.fr/item/GDZPPN00222187X/