@article{FAA_2010_44_2_a3,
     author = {A. Girouard and I. V. Polterovich},
     title = {On the {Hersch{\textendash}Payne{\textendash}Schiffer} inequalities for {Steklov} eigenvalues},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {33--47},
     year = {2010},
     volume = {44},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2010_44_2_a3/}
}