@article{01127598,
title = {Comultiplication on monoids.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {20},
year = {1997},
pages = {803-811},
doi = {10.1155/S0161171297001099},
zbl = {0893.20042},
language = {en},
url = {http://dml.mathdoc.fr/item/01127598}
}
Arkowitz, Martin; Gutierrez, Mauricio. Comultiplication on monoids.. International Journal of Mathematics and Mathematical Sciences, Tome 20 (1997) pp. 803-811. doi : 10.1155/S0161171297001099. http://gdmltest.u-ga.fr/item/01127598/