@article{NSJOM_2008_38_1a_2,
     author = {M. Akram and A. A. Zafar and A. A. Siddiqui},
     title = {A general class

 of contractions: $A$-contractions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {25-33},
     publisher = {mathdoc},
     volume = {38},
     number = {1},
     year = {2008},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2008_38_1a_2/}
}