@article{MZM_2004_76_5_a11,
     author = {G. G. Oniani},
     title = {On {Possible} {Values} of {Upper} and {Lower} {Derivatives} with {Respect} to {Convex} {Differential} {Bases}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {762--775},
     year = {2004},
     volume = {76},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2004_76_5_a11/}
}