Add link to paper

ui.R

@@ -22,7 +22,8 @@ shinyUI(fluidPage(
           upon by both MSAs, and which differ. Output graphs visualise the comparison data for analysis."),
         p("All of the calculations and plots generated by this webtool can also be generated using the underlying ",
           a(href="https://github.com/TS404/AlignStat","AlignStat R package")," which is available on ",
-          a(href="https://cran.r-project.org/package=AlignStat","CRAN"),"")
+          a(href="https://cran.r-project.org/package=AlignStat","CRAN"),""),
+        p("AlignStat is fully described in ",a(href="http://bmcbioinformatics.biomedcentral.com/articles/10.1186/s12859-016-1300-6"," this paper"),". Please cite the paper if you use this tool in your research")
       )
     ),