@article{107089, author = {Ladislav Skula}, title = {On $\delta n$-semigroups}, journal = {Archivum Mathematicum}, volume = {017}, year = {1981}, pages = {43-52}, zbl = {0494.20036}, mrnumber = {672487}, language = {en}, url = {http://dml.mathdoc.fr/item/107089} }
Skula, Ladislav. On $\delta n$-semigroups. Archivum Mathematicum, Tome 017 (1981) pp. 43-52. http://gdmltest.u-ga.fr/item/107089/
Arithmetìc and ideal theory of commutative semigroups, Ann. of Math., 39 (1938), 594-610. (1938)
Divisorentheorie einer Halbgruppe, Math. Zeitschrift, 114 (1970), 113-120. (1970) | MR 0262401 | Zbl 0177.03202