diff --git a/Gleeson_paper.bib b/Gleeson_paper.bib
index 6d5e1f9..953f99b 100755
--- a/Gleeson_paper.bib
+++ b/Gleeson_paper.bib
@@ -63,7 +63,7 @@
 
 @STRING{Oracle = {Oracle Magazine}}
 
-@STRING{Reg = {{\textsuperscript{\scriptsize\textregistered}}}}
+@STRING{Reg = {{\scriptsize\textsuperscript{\textregistered}}}}
 
 @STRING{SEJ = {Software Engineering Journal}}
 
@@ -171,6 +171,15 @@
   pdf = {M/Mack-IS-1991.pdf},
 }
 
+@BOOK{MS-1999-UI,
+  title = {Microsoft} # Reg # { Windows} # Reg # { User Experience: Official Guidelines for User Interface Developers and Designers},
+  publisher = {Microsoft Press},
+  year = {1999},
+  author = {{Microsoft Corporation}},
+  series = {Microsoft} # Reg # { Professional Editions},
+  isbn = {0735605661},
+}
+
 @ARTICLE{Sear-A-1991-IJMMS,
   author = {Andrew Sears and Ben Shneiderman},
   title = {High precision touchscreens: {D}esign strategies and comparisons with a mouse},