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@article{MM2_1979__27_154602, author = {Rainer Picard}, title = {Zur {Theorie} der harmonischen {Differentialformen.}}, journal = {Manuscripta mathematica}, pages = {31--46}, publisher = {mathdoc}, volume = {27}, year = {1979}, zbl = {0406.58002}, url = {http://geodesic.mathdoc.fr/item/MM2_1979__27_154602/} }
Rainer Picard. Zur Theorie der harmonischen Differentialformen.. Manuscripta mathematica, Tome 27 (1979), pp. 31-46. http://geodesic.mathdoc.fr/item/MM2_1979__27_154602/