  Routley/Myer semantics has generated an enormous secondary literature (cf. the secondary literature section of the bibliography), for example Copeland 1979, 1983, Thomas 2015. Debates have surrounded: the interpretation of the semantics (e.g., the ternary relation, the Routley-star operator, non-normal worlds); alternative semantics for relevant logics; the adequacy of non-classical responses to semantic and set-theoretic paradoxes; dialetheism; and naïve set theory. For recent work about the ternary relation see Beall et al 2012; for a recent exchange about the Routley star and negation, see Berto 2015, De and Omori 2018, and Berto and Restall 2019.