Tan, P.J. and D.L. Dowe (2002).  MML Inference of Decision Graphs with
      Multi-Way Joins.  Proc. 15th Australian Joint Conference on
      Artificial Intelligence, Canberra, Australia, 2-6 Dec. 2002,  Published
      in Lecture Notes in Artificial Intelligence (LNAI) 2557, Springer-Verlag,
      pp131-142.  http://www.cs.adfa.edu.au/~abbass/AI02
http://www.csse.monash.edu.au/~dld/Publications/2002/Tan+Dowe2002.ref

The paper is downloadable as postscript (.ps) from
http://www.csse.monash.edu.au/~dld/Publications/2002/Tan+Dowe2002_MMLDecisionGraphs.ps
or as .pdf from
http://www.csse.monash.edu.au/~dld/Publications/2002/Tan+Dowe2002_MMLDecisionGraphs.pdf .