@article{CMH_1988__63_4_140126,
     author = {Hans-Joachim von H\"ohne},
     title = {On weakly positive unit forms.},
     journal = {Commentarii mathematici Helvetici},
     pages = {312--336},
     publisher = {mathdoc},
     volume = {63},
     number = {4},
     year = {1988},
     zbl = {0662.15014},
     url = {http://geodesic.mathdoc.fr/item/CMH_1988__63_4_140126/}
}