Please find below some links to websites on the subject of Ashtanga Vinyasa Yoga. Please note that I do not take any responsibility for the content of these websites.
First things first: the website of R. Sharath Jois in Mysore, the „source“ of Ashtanga Vinyasa Yoga in its present form
The following website gives an overview of workshops of many internationally known teachers
Ron Steiner’s website contains many interesting details, also concerning the exact execution of the common poses of Ashtanga Vinyasa Yoga
I myself usually practice at Private Yoga Institute, close to the Südbahnhof in Frankfurt
Some locations I can recommend for yoga retreats are
and in India
In the meantime, there exist a multitude of blogs concerning Ashtanga Vinyasa Yoga.
I personally find the blog by Anthony Grimmley especially informative
Kino MacGregor’s blog provides - amongst loads of other information - helpful videos on different postures