diff --git a/Gleeson_paper.bib b/Gleeson_paper.bib
index 86bb55e..ee614ab 100755
--- a/Gleeson_paper.bib
+++ b/Gleeson_paper.bib
@@ -1,88 +1,12 @@
 This file was created with JabRef 1.6.
 Encoding: ISO8859_1
 
-@STRING{ACJ = {Australian Computer Journal}}
-
-@STRING{ADT = {Application Development Trends}}
-
-@STRING{AI = {Artificial Intelligence}}
-
-@STRING{AJIS = {Australian Journal of Information Systems}}
-
-@STRING{CACM = {Communications of the ACM}}
-
-@STRING{CJ = {The Computer Journal}}
-
-@STRING{Database = {ACM SIGMIS Database}}
-
-@STRING{DBMS = {DBMS Magazine}}
-
-@STRING{DBPD = {Database Programming {\&} Design}}
-
-@STRING{develop = {{d}evelop, The Apple Technical Journal}}
-
-@STRING{Directions = {Apple Directions}}
-
-@STRING{DKE = {Data {\&} Knowledge Engineering}}
-
-@STRING{EJIS = {European Journal of Information Systems}}
-
-@STRING{IDT = {Internet Development Trends}}
-
-@STRING{IJAST = {International Journal of Applied Software Technology}}
-
-@STRING{IJGIS = {International Journal of Geographical Information Systems}}
-
-@STRING{IJHCS = {International Journal of Human-Computer Studies}}
-
 @STRING{IJMMS = {International Journal of Man-Machine Studies}}
 
-@STRING{IJSEKE = {International Journal of Software Engineering and Knowledge Engineering}}
-
-@STRING{IS = {Information Systems}}
-
-@STRING{ISJ = {Information Systems Journal}}
-
-@STRING{IST = {Information and Software Technology}}
-
-@STRING{JACM = {Journal of the ACM}}
-
-@STRING{JLP = {Journal of Logic Programming}}
-
-@STRING{JOT = {Journal of Object Technology}}
-
-@STRING{JSS = {Journal of Systems and Software}}
-
 @STRING{LNCS = {Lecture Notes in Computer Science}}
 
-@STRING{MISQ = {MIS Quarterly}}
-
-@STRING{NZJC = {New Zealand Journal of Computing}}
-
-@STRING{NZJIS = {New Zealand Journal of Information Systems}}
-
-@STRING{Oracle = {Oracle Magazine}}
-
 @STRING{Reg = {{\scriptsize\textsuperscript{\textregistered}}}}
 
-@STRING{SEJ = {Software Engineering Journal}}
-
-@STRING{SIGMOD = {ACM SIGMOD Record}}
-
-@STRING{SPE = {Software---Practice and Experience}}
-
-@STRING{Surveys = {ACM Computing Surveys}}
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-@STRING{TKDE = {IEEE Transactions on Knowledge and Data Engineering}}
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-@STRING{TM = {{\scriptsize\texttrademark}}}
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-@STRING{TOSE = {IEEE Transactions on Software Engineering}}
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-@STRING{VLDB = {The VLDB Journal}}
-
 @PHDTHESIS{Bend-G-1999-PhD,
   author = {Gregory T. Bender},
   title = {Touch Screen Performance as a Function of the Duration of Auditory Feedback and Target Size},
@@ -129,6 +53,17 @@
   isbn = {0-89791-650-6},
 }
 
+@ARTICLE{Fitt-PM-1954-Law,
+  author = {Paul M.\ Fitts},
+  title = {The information capacity of the human motor system in controlling the amplitude of movement},
+  journal = {Journal of Experimental Psychology},
+  year = {1954},
+  volume = {47},
+  pages = {381--391},
+  number = {6},
+  month = jun,
+}
+
 @ARTICLE{Hara-H-1996,
   author = {Harada, H. and Katsuura, T. and Kikuchi, Y.},
   title = {Fundamental study on the size and inter-key spacing of numeric keys for touch screen},