@article{GDZPPN002224089,
title = {On a Class of Preorderrings of Higher Level.},
journal = {Manuscripta mathematica},
volume = {39},
year = {1982},
pages = {163-210},
zbl = {0537.12015},
url = {http://dml.mathdoc.fr/item/GDZPPN002224089}
}
Basarab, Serban A. On a Class of Preorderrings of Higher Level.. Manuscripta mathematica, Tome 39 (1982) pp. 163-210. http://gdmltest.u-ga.fr/item/GDZPPN002224089/