By Molly Diesing (unpublished?)
"Author Molly Diesing investigates the syntactic and semantic conditions on the expression of spell targets in spells, including cases of explicit mention, deictic wand pointing, noun incorporation, and complete object drop. She then considers whether spells themselves are imperatives or performatives, and, if the latter, what happens when you violate their felicity conditions.
Dr. Diesing will develop this investigation in collaboration with Sally McConnell-Ginet ..."
http://heideas.blogspot.com/2007/09/w-type-pronouns-dragon-heartstring-and.html