          "Why W?",<br>
          The American Scientist,<br>
          Volume 93, March-April 2005, pages 104-108.
        </li>
        <li>
          Kanti Mardia, Peter Jupp,<br>
          Directional Statistics,<br>
          Wiley, 2000,<br>
          ISBN: 0471953334,<br>
          LC: QA276.M335
        </li>
        <li>
          Allan McLeod,<br>
          Algorithm 757:
          MISCFUN: A software package to compute uncommon
          special functions,<br>
          ACM Transactions on Mathem