@article{GDZPPN002230135, title = {On the Transitvity of regular differential Forms.}, journal = {Manuscripta mathematica}, volume = {64}, year = {1989}, pages = {213-224}, zbl = {0704.13004}, url = {http://dml.mathdoc.fr/item/GDZPPN002230135} }
Hübl, Reinhold. On the Transitvity of regular differential Forms.. Manuscripta mathematica, Tome 64 (1989) pp. 213-224. http://gdmltest.u-ga.fr/item/GDZPPN002230135/