@article{JMAG_2007_3_3_a4,
     author = {S. Yu. Favorov and N. Girya},
     title = {A multidimensional version of {Levin's} secular constant theorem and its applications},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {365--377},
     year = {2007},
     volume = {3},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2007_3_3_a4/}
}