@article{GDZPPN001254413,
title = {Joint continuity of affine semigroup actions.},
journal = {Semigroup forum},
volume = {20},
year = {1980},
pages = {153-166},
zbl = {0447.22001},
url = {http://dml.mathdoc.fr/item/GDZPPN001254413}
}
Helmer, D. Joint continuity of affine semigroup actions.. Semigroup forum, Tome 20 (1980) pp. 153-166. http://gdmltest.u-ga.fr/item/GDZPPN001254413/