diff --git a/R/app_ui.R b/R/app_ui.R
index 50d386e..043b62a 100644
--- a/R/app_ui.R
+++ b/R/app_ui.R
@@ -91,7 +91,9 @@ app_ui <- function() {
                # Citation
                HTML(
                "<p><b>Citation:</b></br>
-               <a href='https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0244611'; target='_blank'>Holcombe, A. O., Kovacs, M., Aust, F., & Aczel, B. (2020). Documenting contributions to scholarly articles using CRediT and tenzing. <i>PLoS ONE, 15</i>(12), e0244611.</a></p>"
+              <a href='https://doi.org/10.3233/ISU-210109'; target='_blank'>Kovacs, M., Holcombe, A., Aust, F., & Aczel, B. (2021). Tenzing and the importance of tool development for research efficiency. <i>Information Services & Use, 41</i>, 123-130.</a></p>
+              <BR>
+                <a href='https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0244611'; target='_blank'>Holcombe, A. O., Kovacs, M., Aust, F., & Aczel, B. (2020). Documenting contributions to scholarly articles using CRediT and tenzing. <i>PLoS ONE, 15</i>(12), e0244611.</a></p>"
                     ),
                # Donation
                HTML(
@@ -99,7 +101,7 @@ app_ui <- function() {
                  <a href='https://opencollective.com/tenzing'; target='_blank'>Open Collective</a></p>"
                  ),
                # Privacy notice
-               HTML("<p><b>Privacy notice:</b></br>
+               HTML("<p><b>Privacy notice:</b>
                     <p>To get a sense of how many users we have, we log a masked version of IP addresses. You are not identifiable by the logged information.</p>")
                ),
         column(2)