@article{NSJOM_1994_24_2a_1,
     author = {Constantin Adrian},
     title = {On some fixed point 

 theorems in metric spaces},
     journal = {Novi Sad Journal of Mathematics},
     pages = {9-21},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1994},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1994_24_2a_1/}
}