Alternate hyperlink method.

Docs/sphinx_doc/Discretizations.rst

@@ -237,11 +237,12 @@ With the WENO5 scheme, one has :math:`N=3, \; \omega_{1} = 1/10, \; \omega_{2} =
  q_{m + \frac{1}{2}}^{(3)} = \frac{1}{3} q_{m} + \frac{5}{6} q_{m+1} - \frac{1}{6} q_{m+2}
  \end{array}
 
-Details for the WENO7 scheme are provided in Ref: Shu, C.W. (1997). Essentially Non-Oscillatory and Weighted Essentially Non-Oscillatory
-Schemes for Hyperbolic Conservation Laws, `NASA/CR-97-206253 ICASE Report No. 97-65 <https://www3.nd.edu/~zxu2/acms60790S13/Shu-WENO-notes.pdf>`_.
+Details for the WENO7 scheme are provided in `Shu, C.W. (1997)`_.
 By default, the WENO3 scheme will be employed for moisture variables if the code is compiled with moisture support. However, users may
 utilize the WENO scheme for dry scalar variables as well. The scheme for each type is specified by
 
+.. _`Shu, C.W. (1997)`: https://www3.nd.edu/~zxu2/acms60790S13/Shu-WENO-notes.pdf
+
 ::
 
  erf.dryscal_horiz_adv_type =