@article{SF_1974__6_133969,
     author = {T. Sait\^o},
     title = {Note on quasi-inverse semigroups.},
     journal = {Semigroup forum},
     pages = {129--132},
     publisher = {mathdoc},
     volume = {6},
     year = {1974},
     zbl = {0255.20039},
     url = {http://geodesic.mathdoc.fr/item/SF_1974__6_133969/}
}