@article{JMAG_2002_9_3_a8,
     author = {V. A. Kofanov},
     title = {On exact inequalities of {Kolmogorov} type},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {412--419},
     year = {2002},
     volume = {9},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2002_9_3_a8/}
}