@article{MAN_1937__114_159917,
     author = {J. Haantjes},
     title = {Halblineare {Transformationen}},
     journal = {Mathematische Annalen},
     pages = {293--304},
     publisher = {mathdoc},
     volume = {114},
     year = {1937},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MAN_1937__114_159917/}
}