@article{JMAG_2003_10_2_a8,
     author = {Yu. S. Gasymov},
     title = {On some properties of the eigenvalues by the variation of the domain},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {249--255},
     year = {2003},
     volume = {10},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/JMAG_2003_10_2_a8/}
}