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@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/} }
Wong, James S.W. On common fixed and periodic points. Portugaliae mathematica, Tome 26 (1967) no. 2, pp. 159-163. http://geodesic.mathdoc.fr/item/PORMA_1967__26_2_115013/