Rubinstein 1973, p. 4: "In later years, my manager Sol Hurok used the h-less 'Artur' for my publicity, but I sign 'Arthur' in countries where it is common practice, 'Arturo' in Spain and Italy, and 'Artur' in the Slav countries". Rubinstein, Arthur (1973). My Young Years. New York: Knopf. ISBN0-394-46890-2.