Have a look:
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How LapackDoc works and what's so challenging
http://apfel.mathematik.uni-ulm.de/~lehn/LapackDoc/index.html
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How the Lapack Documentation looks like:
http://apfel.mathematik.uni-ulm.de/~lehn/lapack-3.3.1/SRC/dgetrf.html
http://apfel.mathematik.uni-ulm.de/~lehn/lapack-3.3.1/SRC/dgetrf.f.html