@misc{SF_1975__10_134110,
     title = {Editorial {Messages}},
     journal = {Semigroup forum},
     pages = {189--189},
     publisher = {mathdoc},
     volume = {10},
     year = {1975},
     url = {http://geodesic.mathdoc.fr/item/SF_1975__10_134110/}
}