@article{NSJOM_1992_22_2a_5,
     author = {Ding Xie Ping},
     title = {Random directional 

 contractors and the solution to a system of random multivalued operator 

 equations},
     journal = {Novi Sad Journal of Mathematics},
     pages = {57-70},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {1992},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1992_22_2a_5/}
}