@article{CMH_1960__34_139194,
     author = {Alfred Fr\"olicher and Albert Nijenhuis},
     title = {Invariance of {Vector} {Form} {Opeartions} under {Mappings.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {227--248},
     publisher = {mathdoc},
     volume = {34},
     year = {1960},
     zbl = {0090.38703},
     url = {http://geodesic.mathdoc.fr/item/CMH_1960__34_139194/}
}