@article{VMUMM_2008_3_a7,
     author = {M. K. Potapov and B. V. Simonov and S. Yu. Tikhonov},
     title = {An inequality of {P.\,L.~Ul{\textquoteright}yanov}},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {33--36},
     publisher = {mathdoc},
     number = {3},
     year = {2008},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2008_3_a7/}
}