@article{MAN_1919__80_158814,
     author = {R. Weitzenb\"ock},
     title = {Die {Invarianten} der {Galilei-Newton-Gruppe.} {(Aus} einem {Briefe} an {Herrn} {F.} {Klein.)} {Von} {Roland} {Weitzenb\"ock} in {Prag} .},
     journal = {Mathematische Annalen},
     pages = {75--81},
     publisher = {mathdoc},
     volume = {80},
     year = {1919},
     url = {http://geodesic.mathdoc.fr/item/MAN_1919__80_158814/}
}