@article{MZM_1977_22_3_a8,
     author = {V. D. Ponomarev},
     title = {Absolute upper semicontinuity},
     journal = {Matemati\v{c}eskie zametki},
     pages = {395--399},
     publisher = {mathdoc},
     volume = {22},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1977_22_3_a8/}
}