Robin Hirsch' articles on Modal Logic

• R. Hirsch, I. Hodkinson. , Maarten Marx, Szabolcs Mikulas, and Mark Reynolds. Appendix to  `A modal logic of relations' by Venema & Marx.
  In Logic at work - Essays dedicated to the memory of Helena Rasiowa, Studia Logica library, pages 158-167, Kluwer academic publishers, Dordrecht, 1998.
• R. Hirsch,  I. Hodkinson and A Kurucz. Every logic between K 3 and S5 3 is undecidable and non-finitely axiomatisable
  This is a draft manuscript.  A revised version called "On modal logics between K 3 and S5 3 " appears in the Journal of Symbolic Logic, volume 67, number 1,  pages 221-234, 2002.