@article{BMMS_2002_25_1_a2,
     author = {Sushil Sharma and P.C. Patidar},
     title = {On {Common} {Fixed} {Point} {Theorem} of
                        {Four} {Mappings}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2002},
     volume = {25},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2002_25_1_a2/}
}