Erlewine, Michael Yoshitaka and Hadas Kotek, 2014. “Intervention in focus pied-piping.”
Proceedings of NELS 43, volume 1, pages 117–130.

In this paper we propose a new argument in support of the view that focus association involves covert focus movement with pied-piping, as proposed by Drubig (1994) and more recently supported by Krifka (2006) and Wagner (2006), and against the more prominent approach which does not involve movement (Rooth 1985, 1992). The evidence will come from an interaction between the interpretation of pied-piped constituents with focus intervention effects (Beck 2006).