@article{NSJOM_2014_44_1a_4,
     author = {S.H. Rasouli, and M. Bahrampour},
     title = {A remark on coupled fixed point theorems in partially

 ordered $G$-metric spaces},
     journal = {Novi Sad Journal of Mathematics},
     pages = {53-58},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2014_44_1a_4/}
}