google scholar turned up a hit for this page paper by a gentleman named ian kirk who's apparently a professor at goldsmiths college according to his personal website it was written while he was pursuing his masters' degree but there's no publication information listed it discusses among other things the ambiguity of the ending is that worth adding as a cite also i found a citation for the deleted dream sequence in google book search it's on pages and of the book who wrote that movie screenwriting in review by chris c wehner isbn