@article{GDZPPN00126558X,
title = {Some abstract properties of semigroups appearing in superconformal theories.},
journal = {Semigroup forum},
volume = {54},
year = {1997},
pages = {253-260},
zbl = {0879.58009},
url = {http://dml.mathdoc.fr/item/GDZPPN00126558X}
}
Duplij, S. Some abstract properties of semigroups appearing in superconformal theories.. Semigroup forum, Tome 54 (1997) pp. 253-260. http://gdmltest.u-ga.fr/item/GDZPPN00126558X/