@article{701782,
     title = {Algebraic characterization of the dimension of differential spaces},
     booktitle = {Proceedings of the Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1990},
     pages = {[193]-199},
     mrnumber = {MR1061800},
     zbl = {0712.58008},
     url = {http://dml.mathdoc.fr/item/701782}
}

Multarzyński, Piotr; Sasin, Wiesław. Algebraic characterization of the dimension of differential spaces, dans Proceedings of the Winter School "Geometry and Physics", GDML_Books,  (1990), pp. [193]-199. http://gdmltest.u-ga.fr/item/701782/