@article{MAN_1962__145_160908,
     author = {B. ECKMANN and P.J. HILTON},
     title = {Group-Like {Structures} in {General} {Categories} {I.} {Multiplications} and {Comultiplications.}},
     journal = {Mathematische Annalen},
     pages = {227--255},
     publisher = {mathdoc},
     volume = {145},
     year = {1962},
     zbl = {0099.02101},
     url = {http://geodesic.mathdoc.fr/item/MAN_1962__145_160908/}
}