@article{GDZPPN001264141,
title = {Applications of epigroups to graded ring theory.},
journal = {Semigroup forum},
volume = {51},
year = {1995},
pages = {327-350},
zbl = {0824.16031},
url = {http://dml.mathdoc.fr/item/GDZPPN001264141}
}
Kelarev, A.V. Applications of epigroups to graded ring theory.. Semigroup forum, Tome 51 (1995) pp. 327-350. http://gdmltest.u-ga.fr/item/GDZPPN001264141/