@article{2598,
author = {Kannappan, P.I.},
title = {Characterizing topology on an Abelian semigroup by a functional equation},
journal = {Portugaliae mathematica},
volume = {28},
year = {1969},
pages = {97-101},
zbl = {0213.03102},
mrnumber = {0285644},
language = {en},
url = {http://dml.mathdoc.fr/item/2598}
}
Kannappan, P.I. Characterizing topology on an Abelian semigroup by a functional equation. Portugaliae mathematica, Tome 28 (1969) pp. 97-101. http://gdmltest.u-ga.fr/item/2598/