@article{MV_1977_29_1_a33,
     author = {B. G. Pachpatte},
     title = {On some common fixed point theorems in metric spaces},
     journal = {Matemati\v{c}ki vesnik},
     pages = {289 },
     year = {1977},
     volume = {29},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/MV_1977_29_1_a33/}
}