Added footnote about the array() module.

diff --git a/README.md b/README.md
index 27d5634..652105d 100644 (file)
--- a/README.md
+++ b/README.md
@@ -21,4 +21,7 @@ Summary
   __Approach:__ Traditional matrix
 * __ID:__ 003,
   __Language:__ Erlang,
-  __Approach:__ Traditional matrix as nested array()
+  __Approach:__ Traditional matrix as nested [array()]
+
+
+[array()]: http://www.erlang.org/doc/man/array.html "Which is not actually an array, but an integer-keyed tree."
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