paper.pdf
2013-04-01 Christian Urban fixed counterexample according to def in Chap 8
2013-03-29 Christian Urban changed the introduction adn cited Zammit
2013-03-29 Christian Urban updated according to comments from reviewers
2013-03-27 Christian Urban tunded
2013-03-27 Christian Urban adapted paper
2013-03-12 Christian Urban better printing of register programs in Scala
2013-03-07 Christian Urban tuned conclusion
2013-03-07 Christian Urban small typo in the paper
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