@article{NSJOM_1988_18_1a_14,
     author = {Popa Valeriu},
     title = {A coincidence theorem for 

 multifunctions},
     journal = {Novi Sad Journal of Mathematics},
     pages = {149-156},
     publisher = {mathdoc},
     volume = {18},
     number = {1},
     year = {1988},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1988_18_1a_14/}
}