diff --git a/oauth3.js b/oauth3.js
index b4d74f2..1c66232 100644
--- a/oauth3.js
+++ b/oauth3.js
@@ -139,7 +139,7 @@
     return oauth3.discover(providerUri, opts).then(function (directive) {
       var prequest = core.implicitGrant(
         directive
-        // TODO OAuth3 provider should referer / origin as the appId?
+        // TODO OAuth3 provider should referrer / referer / origin as the appId?
       , opts
       );
 
@@ -530,6 +530,11 @@
     return promise || promise2;
   };
 
+  oauth3.core = core;
+  oauth3.querystringify = core.querystringify;
+  oauth3.scopestringify = core.stringifyscope;
+  oauth3.stringifyscope = core.stringifyscope;
+
   exports.OAUTH3 = oauth3.oauth3 = oauth3.OAUTH3 = oauth3;
   exports.oauth3 = exports.OAUTH3;