@article{GDZPPN002357100, title = {A study of graded extremal rings and of monominal rings.}, journal = {Mathematica Scandinavica}, volume = {50}, year = {1982}, pages = {22-34}, zbl = {0498.13012}, url = {http://dml.mathdoc.fr/item/GDZPPN002357100} }
Fröberg, Ralf. A study of graded extremal rings and of monominal rings.. Mathematica Scandinavica, Tome 50 (1982) pp. 22-34. http://gdmltest.u-ga.fr/item/GDZPPN002357100/