@article{SF_1990__41_2_135036,
     author = {S. Bulman-Fleming and V.A.R. Gould},
     title = {On left absolutely flat monoids.},
     journal = {Semigroup forum},
     pages = {55--60},
     publisher = {mathdoc},
     volume = {41},
     number = {2},
     year = {1990},
     zbl = {0696.20052},
     url = {http://geodesic.mathdoc.fr/item/SF_1990__41_2_135036/}
}