Dear Jack,

> Thanks to you and to Geraint for those precisions.  You mentioned
> Volterra-kernels which still look like a kind of mathematical monster
> to me.  As far as I remember, the only paper mentioning it was the
> Karl's MRM paper, and I haven't found many help in the mail archives.
> Is there other reference on this, or could you comment briefly on its
> basis, and the way to use it in SPM99b. I feel like missing something
> important here.

The MRM paper is still the best reference although we have a paper
submitted that deals with Volterra-kernels in relation to effective

With best wishes - Karl