diff --git a/Changelog.txt b/Changelog.txt
index 81e9c74..343c9e6 100644
--- a/Changelog.txt
+++ b/Changelog.txt
@@ -1,3 +1,6 @@
+* 2018-04-27
+	- Added paper ``No Encore for Encore? Ethical questions for web-based censorship measurement''
+
 * 2018-04-26
 	- Added paper ``Mending Wall: On the Implementation of Censorship in India''
 
diff --git a/header.tpl b/header.tpl
index 66c5b31..598e638 100644
--- a/header.tpl
+++ b/header.tpl
@@ -83,7 +83,7 @@
       (<a href="author_reverse.html">reverse</a>) <a href="author.html">author</a> <br />
       Feedback: <a href="mailto:phw@nymity.ch">phw@nymity.ch</a> (<a
       href="https://nymity.ch/openpgp_public_key.txt">OpenPGP</a>) <br />
-      Last updated: <a href="Changelog.txt">2018-04-26</a> <br />
+      Last updated: <a href="Changelog.txt">2018-04-27</a> <br />
       Onion site: <a href="http://3wcwjjnuvjyazeza.onion">3wcwjjnuvjyazeza.onion</a> <br />
       Code: <a href="https://github.com/NullHypothesis/censorbib">GitHub</a>
     </div>
diff --git a/references.bib b/references.bib
index 10a1eae..2de995c 100644
--- a/references.bib
+++ b/references.bib
@@ -1,3 +1,11 @@
+@article{Narayanan2015a,
+	author = {Arvind Narayanan and Bendert Zevenbergen},
+	title = {No Encore for {Encore}? Ethical Questions for Web-Based Censorship Measurement},
+	journal = {Technology Science},
+	year = {2015},
+	url = {https://techscience.org/a/2015121501/download.pdf},
+}
+
 @inproceedings{Gosain2017a,
 	author = {Devashish Gosain and Anshika Agarwal and Sahil Shekhawat and H. B. Acharya and Sambuddho Chakravarty},
 	title = {Mending Wall: On the Implementation of Censorship in {I}ndia},