@article{NSJOM_1990_20_1a_17,
     author = {Ewert 

 Janina and Lipski Tadeusz},
     title = {On {S} {\textendash} quasi {\textendash} continuous 

 multivalued maps},
     journal = {Novi Sad Journal of Mathematics},
     pages = {167-183},
     publisher = {mathdoc},
     volume = {20},
     number = {1},
     year = {1990},
     url = {http://geodesic.mathdoc.fr/item/NSJOM_1990_20_1a_17/}
}