Relevance Logic - Article in the Stanford Encyclopaedia of Philosophy, by Edwin Mares. plato.stanford.edu/entries/logic-relevance/index.html
Relevance Logic and Concurrent Composition - Disseratation by Mads Dan, investigating the general model theory of propositional relevance logic. www.dcs.ed.ac.uk/home/lfcsreps/EXPORT/90/ECS-LFCS-90-119
