@article{GDZPPN001257064, title = {The ideal structure of XX.}, journal = {Semigroup forum}, volume = {30}, year = {1984}, pages = {41-52}, zbl = {0532.22004}, url = {http://dml.mathdoc.fr/item/GDZPPN001257064} }
Milnes, P.; Hindman, N. The ideal structure of XX.. Semigroup forum, Tome 30 (1984) pp. 41-52. http://gdmltest.u-ga.fr/item/GDZPPN001257064/