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<li><a href="http://www.network-theory.co.uk/gcc/intro/">An Introduction
to GCC</a> by Brian J. Gough.</li>
- <li><a href="http://en.wikibooks.org/wiki/GNU_C_Compiler_Internals">GNU C Compiler Internals (Wikibook)</a>, numerous contributors.</li>
+ <li><a href="https://en.wikibooks.org/wiki/GNU_C_Compiler_Internals">GNU C Compiler Internals (Wikibook)</a>, numerous contributors.</li>
<li><a href="http://www.immerundewig.at/thesis/">Compilation
of Functional Programming Languages using GCC -- Tail Calls</a>