@article{GDZPPN002221713,
title = {Zur Theorie der harmonischen Differentialformen.},
journal = {Manuscripta mathematica},
volume = {29},
year = {1979},
pages = {31-46},
zbl = {0406.58002},
url = {http://dml.mathdoc.fr/item/GDZPPN002221713}
}
Picard, Rainer. Zur Theorie der harmonischen Differentialformen.. Manuscripta mathematica, Tome 29 (1979) pp. 31-46. http://gdmltest.u-ga.fr/item/GDZPPN002221713/