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-<H2>IMPP--An imperative language with procedures</H2>
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-This is an extension of <A HREF="../IMP/">IMP</A> with local variables
-and mutually recursive procedures. For documentation see
-<A HREF="http://isabelle.in.tum.de/Bali/papers/FSTTCS99.html">
-Hoare Logic for Mutual Recursion and Local Variables</A>.
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