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@article{MM2_1982__37_154835, author = {Serban A. Basarab}, title = {On a {Class} of {Preorderrings} of {Higher} {Level.}}, journal = {Manuscripta mathematica}, pages = {163--210}, publisher = {mathdoc}, volume = {37}, year = {1982}, zbl = {0537.12015}, url = {http://geodesic.mathdoc.fr/item/MM2_1982__37_154835/} }
Serban A. Basarab. On a Class of Preorderrings of Higher Level.. Manuscripta mathematica, Tome 37 (1982), pp. 163-210. http://geodesic.mathdoc.fr/item/MM2_1982__37_154835/