@article{MV_1976_28_2_a33,
     author = {M. S. Khan},
     title = {\'Ciri\'c fixed point theorem},
     journal = {Matemati\v{c}ki vesnik},
     pages = {393 },
     year = {1976},
     volume = {28},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/MV_1976_28_2_a33/}
}