@article{MAN_1968__175_161657,
     author = {H. OSBOBN},
     title = {Modules of {Differentials,} {II.}},
     journal = {Mathematische Annalen},
     pages = {146--158},
     publisher = {mathdoc},
     volume = {175},
     year = {1968},
     url = {http://geodesic.mathdoc.fr/item/MAN_1968__175_161657/}
}