Ποιος χρονολόγησε Olga Spessivtseva;

Olga Alexandrovna Spessivtseva (Russian: Ольга Алекса́ндровна Спеси́вцева; 18 July [O.S. 6 July] 1895 – 16 September 1991) was a Russian ballerina whose stage career spanned from 1913 to 1939.

She was one of the finest prima ballerinas of the twentieth century. She had the excellent classical technique, immaculate style and scenic spirituality which are considered the embodiment of the romantic ballerina.

Akim Lvovich Volynsky (Аким Львович Волынский, real name Khaim Leybovich Flekser, Хаим Лейбович Флексер; 3 May 1861 – 6 July 1926) was a Russian literary (later theatre and ballet) critic and historian, one of the early ideologists of the Russian Modernism.