@article{MAN_1965__162_161321,
     author = {R. Baer},
     title = {Die {Sternbedingung:} {Eine} {Erweiterung} der {Engelbedingung.}},
     journal = {Mathematische Annalen},
     pages = {54--73},
     publisher = {mathdoc},
     volume = {162},
     year = {1965},
     zbl = {0131.02204},
     url = {http://geodesic.mathdoc.fr/item/MAN_1965__162_161321/}
}