@article{VMUMM_2010_3_a9,
     author = {A. N. Gorbachev},
     title = {Invariant measures for non-contracting multi-valued mappings of the circle},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {43--46},
     year = {2010},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2010_3_a9/}
}