@article{CMH_1945__18_138872,
     author = {Gerhard Stohler},
     title = {\"Uber eine {Klasse}  von einparametrigen {Differential-Transformationsgruppen.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {76--121},
     publisher = {mathdoc},
     volume = {18},
     year = {1945},
     zbl = {0061.20707},
     url = {http://geodesic.mathdoc.fr/item/CMH_1945__18_138872/}
}