Secondary stalls

[zerozero]

I know that a given airfoil will always stall at the same angle of attack but I'm under the impression that if you experience a 'secondary stall' then the airfoil will, in fact, stall at a lower angle of attack.

Am I incorrect?

I've looked through my books and cannot find any information. I would appreciate it if you could cite a source.

Thanks.

[Edited to ask for source]