@article{10_4153_CMB_1974_104_2,
     author = {Wong, Chi Song},
     title = {Fixed {Point} {Theorems} for {Point-to-Set} {Mappings}},
     journal = {Canadian mathematical bulletin},
     pages = {581--586},
     year = {1974},
     volume = {17},
     number = {4},
     doi = {10.4153/CMB-1974-104-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-104-2/}
}