@article{CMJ_2000_50_3_a0,
     author = {\'Ciri\'c, Ljubomir},
     title = {On a generalization of a {Gregu\v{s}} fixed point theorem},
     journal = {Czechoslovak Mathematical Journal},
     pages = {449--458},
     year = {2000},
     volume = {50},
     number = {3},
     mrnumber = {1777468},
     zbl = {1079.47509},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2000_50_3_a0/}
}