pass-then-pull

There have been threads here about whether pass-then-pull should be a
strong action (as in BWS) or a weak action.

There is lately a version of the forcing pass in which pass tells
partner to double if he would have passed a penalty double and double
shows a more offensive hand but not enough to bid at the next level.
Does anyone have any thoughts on pass-then-pull in this setting, as
compared with the traditional forcing-pass structure?  Is there any
literature on this?

David