@article{NSJOM_2012_42_2a_5,
     author = {Valeriu Popa, and Alina-Mihaela Patriciu},
     title = {Two general fixed point theorems for pairs of weakly compatible mappings in $G$-metric spaces},
     journal = {Novi Sad Journal of Mathematics},
     pages = {49-60},
     year = {2012},
     volume = {42},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_2012_42_2a_5/}
}