@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/