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Commutative semigroups whose proper subsemigroups are projective.
Semigroup forum, Tome 6 (1974), pp. 35-41 Cet article a éte moissonné depuis la source European Digital Mathematics Library

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@article{SF_1974__6_133957,
     author = {T.E. Nordahl},
     title = {Commutative semigroups whose proper subsemigroups are projective.},
     journal = {Semigroup forum},
     pages = {35--41},
     year = {1974},
     volume = {6},
     zbl = {0275.20105},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133957/}
}
TY  - JOUR
AU  - T.E. Nordahl
TI  - Commutative semigroups whose proper subsemigroups are projective.
JO  - Semigroup forum
PY  - 1974
SP  - 35
EP  - 41
VL  - 6
UR  - http://geodesic.mathdoc.fr/item/SF_1974__6_133957/
ID  - SF_1974__6_133957
ER  - 
%0 Journal Article
%A T.E. Nordahl
%T Commutative semigroups whose proper subsemigroups are projective.
%J Semigroup forum
%D 1974
%P 35-41
%V 6
%U http://geodesic.mathdoc.fr/item/SF_1974__6_133957/
%F SF_1974__6_133957
T.E. Nordahl. Commutative semigroups whose proper subsemigroups are projective.. Semigroup forum, Tome 6 (1974), pp. 35-41. http://geodesic.mathdoc.fr/item/SF_1974__6_133957/