@article{SF_1996__53_2_135483,
     author = {G. Watier},
     title = {Left divisibility and word problems in single relation monoids.},
     journal = {Semigroup forum},
     pages = {194--207},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1996},
     zbl = {0878.20039},
     url = {http://geodesic.mathdoc.fr/item/SF_1996__53_2_135483/}
}