diff --git a/defenses.tex b/defenses.tex
index b4f4fa3..b76e115 100644
--- a/defenses.tex
+++ b/defenses.tex
@@ -44,18 +44,19 @@ For either opt-out or opt-in to work, a web site has to provide an option for
 doing so. Because web sites increasingly use third parties to manage data
 collection on their site, consent or rejection has to be passed to these third
 parties and they have to be willing to accept such a decision. Since the
-European's \gls{GDPR} came into force in 2018, service providers operating in
-the European Union are required to ask users for explicit consent before
-collecting any data, except when that data is absolutely necessary to ensure
-basic functionality. It is not allowed to notify the user that by continuing to
-visit the web site, consent to data collection is given. Furthermore, if consent
-is not given, the web site provider is not allowed to block the user from
-visiting the web site. Even before the \gls{GDPR}, the EU required web sites to
-ask for informed consent via the ePrivacy Directive which came into force in
-2013. \citet{trevisanYearsEUCookie2019} use their tool \emph{CookieCheck} to
-evaluate how many of the surveyed 35.000 sites comply with the legislation put
-forth in the ePrivacy Directive. Their findings indicate that almost half (49\%)
-of the web sites use profiling technologies without consent. Similarly,
+European's \gls{GDPR} \cite{europeanparliamentGeneralDataProtection2016} came
+into force in 2018, service providers operating in the European Union are
+required to ask users for explicit consent before collecting any data, except
+when that data is absolutely necessary to ensure basic functionality. It is not
+allowed to notify the user that by continuing to visit the web site, consent to
+data collection is given. Furthermore, if consent is not given, the web site
+provider is not allowed to block the user from visiting the web site. Even
+before the \gls{GDPR}, the EU required web sites to ask for informed consent via
+the ePrivacy Directive which came into force in 2013.
+\citet{trevisanYearsEUCookie2019} use their tool \emph{CookieCheck} to evaluate
+how many of the surveyed 35.000 sites comply with the legislation put forth in
+the ePrivacy Directive. Their findings indicate that almost half (49\%) of the
+web sites use profiling technologies without consent. Similarly,
 \citet{sanchez-rolaCanOptOut2019a} show that tracking is still prevalent  and
 happens already before user consent is given after the \gls{GDPR} has been in
 force for a year. \citet{huCharacterisingThirdParty2019} come to a a similar
@@ -75,7 +76,7 @@ in chapter~\ref{chap:tracking methods} can be defended against.
 
 For our purposes, clearing the browser history means not only clearing the web
 sites that have been visited but also cookies and other relevant data that is
-saved with a visit to a web site. All major browser offer this functionality and
+saved with a visit to a web site. All major browsers offer this functionality and
 what they delete is similar. Firefox, for example, allows clearing the browsing
 and search history, form and search history, cookies (also flash cookies), the
 cache, active logins, offline web site data and site preferences such as
diff --git a/references.bib b/references.bib
index 7dea550..b0f212a 100644
--- a/references.bib
+++ b/references.bib
@@ -461,8 +461,9 @@
   author = {European Parliament and European Council},
   year = {2016},
   month = apr,
-  url = {https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32016R0679\&from=EN\#d1e6620-1-1},
-  urldate = {2020-08-25}
+  url = {https://eur-lex.europa.eu/legal-content/EN/TXT/HTML/?uri=CELEX:32016R0679},
+  urldate = {2020-08-25},
+  note = {Accessed 2020-08-25}
 }
 
 @inproceedings{falahrastegarTrackingPersonalIdentifiers2016,
@@ -494,7 +495,8 @@ Web cache timing attacks},
   shorttitle = {Hypertext {{Transfer Protocol}} ({{HTTP}}/1.1)},
   author = {Fielding, Roy and Reschke, Julian},
   url = {https://tools.ietf.org/html/rfc7232\#section-2.3},
-  urldate = {2020-08-25}
+  urldate = {2020-08-25},
+  note = {Accessed 2020-08-25}
 }
 
 @misc{fieldingHTTPLastModified,
@@ -502,7 +504,8 @@ Web cache timing attacks},
   shorttitle = {Hypertext {{Transfer Protocol}} ({{HTTP}}/1.1)},
   author = {Fielding, Roy and Reschke, Julian},
   url = {https://tools.ietf.org/html/rfc7232\#section-2.2},
-  urldate = {2020-08-25}
+  urldate = {2020-08-25},
+  note = {Accessed 2020-08-25}
 }
 
 @misc{fieldingHTTPSemanticsContent2014,
@@ -1183,7 +1186,8 @@ Impact of CSS-based history detection},
   year = {2018},
   month = aug,
   url = {https://tools.ietf.org/html/rfc8446},
-  urldate = {2020-08-25}
+  urldate = {2020-08-25},
+  note = {Accessed 2020-08-25}
 }
 
 @inproceedings{reznichenkoAuctionsDonottrackCompliant2011,