@article{SF_1975__11_134147,
     author = {C.A. Boyd},
     title = {RESIDUATION {IN} {SEMIGROUPS} {OF} {PRE-CLOSURES.}},
     journal = {Semigroup forum},
     pages = {328--336},
     publisher = {mathdoc},
     volume = {11},
     year = {1975},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SF_1975__11_134147/}
}