@article{SF_1984__30_134725,
     author = {M. Yamada},
     title = {Quasi-inverse semigroups with special involution.},
     journal = {Semigroup forum},
     pages = {283--290},
     publisher = {mathdoc},
     volume = {30},
     year = {1984},
     zbl = {0535.20037},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__30_134725/}
}