@article{MAN_1967__174_161637,
     author = {H. GERBER},
     title = {An {Extension} of {Sch\"utte's} {Klammersymbols.}},
     journal = {Mathematische Annalen},
     pages = {203--216},
     publisher = {mathdoc},
     volume = {174},
     year = {1967},
     zbl = {0162.01901},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__174_161637/}
}