@article{VMUMM_2003_6_a12,
     author = {S. V. Dil'man},
     title = {A converse of the {Hartman{\textendash}Wintner} theorem},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {56--58},
     year = {2003},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2003_6_a12/}
}