Fix links

skimage/feature/texture.py

@@ -259,7 +259,7 @@ def local_binary_pattern(image, P, R, method='default'):
             finer quantization of the angular space which is gray scale and
             rotation invariant.
         * 'nri_uniform': non rotation-invariant uniform patterns variant
-            which is only gray scale invariant [2].
+            which is only gray scale invariant [2]_.
         * 'var': rotation invariant variance measures of the contrast of local
             image texture which is rotation but not gray scale invariant.
 

skimage/morphology/grey.py

@@ -53,7 +53,7 @@ def _invert_selem(selem):
     """Change the order of the values in `selem`.
 
     This is a patch for the *weird* footprint inversion in
-    `nd.grey_morphology` [1].
+    `nd.grey_morphology` [1]_.
 
     Parameters
     ----------