@article{PORMA_1967__26_2_115013,
     author = {Wong, James S.W.},
     title = {On common fixed and periodic points},
     journal = {Portugaliae mathematica},
     pages = {159--163},
     publisher = {mathdoc},
     volume = {26},
     number = {2},
     year = {1967},
     mrnumber = {0410490},
     zbl = {0184.26802},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115013/}
}