Long Bow/Slow Bow methods

[iujkjk]

Hey there,

Anyone have a suggestion on long bow method books or etudes? I've a fantastic exercise Homer Mensch gave me years ago but I'm afraid that I've become too familiar with it. I'm not certain any longer if I'm still learning from it(not that it doesn't have more to teach me). I'm looking to mix it up a little.

This was also posted in the Orchestral Technique section but it seems it might be more appropriate here.

Thanks in advance.
davebam