--- a/model/prov-dm.html	Sat May 26 09:03:26 2012 +0100
+++ b/model/prov-dm.html	Sat May 26 09:03:46 2012 +0100
@@ -130,7 +130,7 @@
          "Prentice-Hall. 1985"+
          "URL: <a href=\"http://www.usingcsp.com/cspbook.pdf\">http://www.usingcsp.com/cspbook.pdf</a>",
         "Logic":
-          "W. E. Johnson"+
+          "W. E. Johnson "+
           "<a href=\"http://www.ditext.com/johnson/intro-3.html\"><cite>Logic: Part III</cite></a>."+
           "1924. "+
           "URL: <a href=\"http://www.ditext.com/johnson/intro-3.html\">http://www.ditext.com/johnson/intro-3.html</a>",