:

  •  
                                                          

    ( . ) (. 1904)

    ( . ) (. 1904)

    . " " (1933-40) , "" (1943), " N 4" (1945).

    ( . 1930)
    (Bethe) ( . 1906)

    (Bartok) (1881-1945)
    ( 95-175)
    :