@article{MZ_1966__94_170632,
     author = {J\"urgen Flachsmeyer},
     title = {Zur {Theorie} der {H-abgeschlossenen} {Erweiterungen.}},
     journal = {Mathematische Zeitschrift},
     pages = {349--381},
     publisher = {mathdoc},
     volume = {94},
     year = {1966},
     zbl = {0147.41504},
     url = {http://geodesic.mathdoc.fr/item/MZ_1966__94_170632/}
}