 the interior of a tetrahedron in 3D.
    </p>

    <p>
      <a href = "../../m_src/tetrahedron_felippa_rule/tetrahedron_felippa_rule.html">
      TETRAHEDRON_FELIPPA_RULE</a>,
      a MATLAB library which
      returns Felippa's quadratures rules for approximating integrals
      over the interior of a tetrahedron in 3D.
    </p>

    <p>
      <a href = "../../m_src/tetrahedron_integrals/tetrahedron_integrals.html">
      TETRAHEDRON_INTEGRALS</a>,
      a MATLAB library which
      returns the exact val