@article{10_21136_CMJ_1992_128321,
     author = {Lai, C. K. and Shum, K. P.},
     title = {A note in inverse and dual semigroups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {7--10},
     year = {1992},
     volume = {42},
     number = {1},
     doi = {10.21136/CMJ.1992.128321},
     mrnumber = {1152162},
     zbl = {0792.20058},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128321/}
}