@article{GDZPPN001252682, title = {Tensor product of commutative unions of groups.}, journal = {Semigroup forum}, volume = {16}, year = {1978}, pages = {105-108}, zbl = {0387.20045}, url = {http://dml.mathdoc.fr/item/GDZPPN001252682} }
Anderson, J.A.; Kimura, N. Tensor product of commutative unions of groups.. Semigroup forum, Tome 16 (1978) pp. 105-108. http://gdmltest.u-ga.fr/item/GDZPPN001252682/