He delegates to his other paper with "A long discussion of the issues can be found in my submission to MASPEGHI 2013 [1]". That paper can be found here: http:

He delegates to his other paper with "A long discussion of the issues can be found in my submission to MASPEGHI 2013 [1]". That paper can be found here: http://www.cs.jyu.fi/maspeghi2013/papers.html http://www.cs.jyu.fi/maspeghi2013/papers.html specifically: http://www.cs.jyu.fi/maspeghi2013/p17-black.pdf http://www.cs.jyu.fi/maspeghi2013/p17-black.pdf