@article{MZ_1978__162_172715,
     author = {Werner B\"ani and Herbert Gross},
     title = {On {SAP} {Fields.}},
     journal = {Mathematische Zeitschrift},
     pages = {69--74},
     publisher = {mathdoc},
     volume = {162},
     year = {1978},
     zbl = {0368.15015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1978__162_172715/}
}