@article{VMUMM_1985_1_a4,
     author = {A. G. Savchenko},
     title = {Properties of the mapping $\exp^c_n f$},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {19--25},
     year = {1985},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1985_1_a4/}
}