What were the relationship between Petipa and Tchaikovsky?

Question by iris: The relationship between Petipa and Tchaikovsky?
i am writing a dissertation on how Petipa and Tchaikovsky worked closely together on their ballets,how their relationship developed overtime; and what changes this made in the balance between ballet and dance.
the only problem is i am finding it increasingly difficult to find anything on their relationship, and how they worked together on their ballets.

can anyone suggest any articles, books, web pages, anything?

Answers and Views:

Answer by the italian
Marius Petipa was born in Marseille in 1822 from a family of dancers and coreographers. The turning point of his dancer’s career was in 1847 when he left Spain and moved to St. Petersburg. Around 1858, he stopped dancing and became a full-time coreographer.

The main accomplishment by Petipa on Tchaikovsky’s ballets was Swan Lake production in 1895, mind, after the composer’s death. Working with his assistant, Lev Ivanov, he debuted on Jan.15, 1895 at the Mariinskij Theatre. Petipa covered acts I, III and Ivanov acts II, IV. The italian composer Riccardo Drigo completed some musical parts

Formerly, he had produced the other two ballets for Tchaikovsky’s music (The Nutcracker 1876, The Sleeping Beauty 1889). Petipa had the field-experience to balance the musical contents with dancing effects and techniques. To the best of my knowledge, a deep personal cooperation between composer and coreographer isn’t reported.
Particularly, the general rehearsal of Sleeping Beauty, supported by Alexandrovič Vsevoložskij, director of Imperial Theatres, had the Czar to assist. He was simply commenting ‘Nice’ which deeply offended Tchaikovsky. The dancers chosen by Petipa were Carlotta Brianza, Pavel Gerdt and Enrico Cecchetti.

Read all the answers in the comments.

What do you think?