@article{PIM_1976_N_S_20_34_a10,
     author = {Ljubomir B. \'Ciri\'c},
     title = {Fixed {Points} {Of} {Weakly} {Contraction} {Mappings}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {79 },
     publisher = {mathdoc},
     volume = {_N_S_20},
     number = {34},
     year = {1976},
     url = {http://geodesic.mathdoc.fr/item/PIM_1976_N_S_20_34_a10/}
}