diff --git a/content/da-07-dois.md b/content/da-07-dois.md
index 685e967..f4ff3d9 100644
--- a/content/da-07-dois.md
+++ b/content/da-07-dois.md
@@ -155,6 +155,6 @@
     In many cases these were studies in which data were stated to be "available upon request"
 </ul>
 
-<p class="footnote">1. Stodden, V., Seiler, J., Ma, Z., 2018. An empirical analysis of journal policy effectiveness for computational reproducibility. Proceedings of the National Academy of Sciences 115, 2584--2589. <a href="https://doi.org/10.1073/pnas.1708290115">https://doi.org/10.1073/pnas.1708290115</a>
+<p class="footnote">1. Stodden, V., Seiler, J., Ma, Z., 2018. An empirical analysis of journal policy effectiveness for computational reproducibility. Proceedings of the National Academy of Sciences 115, 2584&ndash;2589. <a href="https://doi.org/10.1073/pnas.1708290115">https://doi.org/10.1073/pnas.1708290115</a>
 <br/>
-2. Gabelica, M., Boj&ccirc;i&cacute;, R., Puljak, L., 2022. Many researchers were not compliant with their published data sharing statement: a mixed-methods study. Journal of Clinical Epidemiology 150, 33--41. <a href="https://doi.org/10.1016/j.jclinepi.2022.05.019">https://doi.org/10.1016/j.jclinepi.2022.05.019</a></p>
+2. Gabelica, M., Boj&ccaron;i&cacute;, R., Puljak, L., 2022. Many researchers were not compliant with their published data sharing statement: a mixed-methods study. Journal of Clinical Epidemiology 150, 33&ndash;41. <a href="https://doi.org/10.1016/j.jclinepi.2022.05.019">https://doi.org/10.1016/j.jclinepi.2022.05.019</a></p>