I have linked to the two papers he has available on his website and you can download them and have a read. If you do read them please add a comment as I would be interested in knowing what other people think about this subject.
The first paper is a historical review of the notion of a poem film and offers a short literature review of the subject.
The second paper is an analysis of his own practice and attempts to draw parallels between literary and visual languages. Though he does say he has moved on from some of these ideas now they are still interesting to read.
The texts are available on his website as well should you want to reference them.