@article{ZNSL_2009_372_a16,
     author = {S. Yu. Pilyugin and J. Rieger},
     title = {General hyperbolicity conditions for set-valued mappings},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {172--186},
     publisher = {mathdoc},
     volume = {372},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2009_372_a16/}
}