I'm writing my diploma about the development of festival tourism in Europe(without countries of the former USSR). I'd like to ask you to find articles and books about festival tourism in Europe, festivals in european contries and their peculiar properties, geography of festival tourism in Europe and statistics on attendance of the largest festivals by tourists from different countries (especially from Russia).
Your question is very wide ...
Here are a few links to make the subject narrower:
Google has scholar search:
and some statistics:
Worldcat is an easy way to find books published in different countries on a particular topic: