@article{CMH_1956__30_139114,
     author = {Walter Senft},
     title = {\"Uber die {Einf\"uhrung} des {Kongruenzbegriffes} in der {Theorie} der linearen {R\"aume.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {73--97},
     publisher = {mathdoc},
     volume = {30},
     year = {1956},
     zbl = {0066.09303},
     url = {http://geodesic.mathdoc.fr/item/CMH_1956__30_139114/}
}