Am I the last person to have noticed that the Vaganova Ballet Academy has published a serious journal containing the work of Russian dance scholars, Bulletin of the Vaganova Ballet Academy,since 2015, with six issues a year? The articles are in Russian, but all have English abstracts. Given that there’s such a divide in most countries between academic scholarship and practical ballet teaching, it’s astonishing to see both together in the institute most famous globally for producing dancers rather than scholars. 

I came across it by chance, because I was looking up something about airs parlants, and found an  article by Galina Bezuglaya on airs parlants in early 19th century ballet—which will give you some idea of the level of scholarship. A glance through the contents pages reveals a huge breadth and depth.