added note on implementation

chrislit · Jan 11, 2019 · 3509ac2 · 3509ac2
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diff --git a/abydos/distance/_dunning.py b/abydos/distance/_dunning.py
@@ -39,7 +39,7 @@ class Dunning(_TokenDistance):
     r"""Dunning similarity.
 
     For two sets X and Y and a population N, Dunning log-likelihood
-    :cite:`Dunning:1993` is
+    :cite:`Dunning:1993`, following :cite:`SequentiX:2018`, is
 
         .. math::
 

diff --git a/docs/abydos.bib b/docs/abydos.bib
@@ -2177,6 +2177,15 @@ @Article{Seiffert:1993
   Volume                   = {11}
 }
 
+@Misc{SequentiX:2018,
+  Title                    = {Distance Measures},
+
+  Author                   = {SequentiX},
+  Year                     = {2018},
+
+  Url                      = {https://www.sequentix.de/gelquest/help/distance_measures.htm}
+}
+
 @Article{Shannaq:2010,
   Title                    = {Using Product Similarity for Adding Business},
   Author                   = {Shannaq, {Boumedyen A. N.} and Alexandrov, {Victor V.}},