↑ Kant, Marion (2007). The Cambridge companion to ballet. Cambridge University Press. p. 164.
↑ Chaĭkovskiĭ,, Modest Ilʹich (1906). The life & letters of Peter Ilich Tchaikovsky. J. Lane. p. 735. Unknown parameter |coauthors= ignored (|author= suggested) (help)CS1 maint: extra punctuation (link)
