  hyperrectangles and simplices.
    </p>

    <p>
      <a href = "../../cpp_src/gsl/gsl.html">
      GSL</a>,
      a C++ library which
      includes routines for estimating multidimensional integrals.
    </p>

    <p>
      <a href = "../../f_src/integral_test/integral_test.html">
      INTEGRAL_TEST</a>,
      a FORTRAN90 program which 
      uses some of
      these test integrals to evaluate sets of quadrature points.
    </p>

    <p>
      <a href = "../../m_src/nint_exactness/nint_exactness.html"