I'm currently handling a difficult case where a poetry publisher is demanding a royalty for citation of text within a work of literary criticism. They want to know how many "copies" we are "printing" so they can charge us. It is my view that this is totally extortionate and that this use is "fair dealing" under UK law for purposes of criticism and review.
Martin Paul Eve (Mon,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: