@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/