diff --git a/30_Thesis/sections/50_design_and_implementation.tex b/30_Thesis/sections/50_design_and_implementation.tex
index 5dbc5b5..0bda711 100644
--- a/30_Thesis/sections/50_design_and_implementation.tex
+++ b/30_Thesis/sections/50_design_and_implementation.tex
@@ -43,7 +43,7 @@ When a recommendation is supposed to be generated, \texttt{M.Collab} sends a HTT
     \label{fig:DesignImplementation:SequenceDiagramRecommendation}
 \end{figure}
 
-The REST API defines the following Endpoints.
+The REST API defines the following Endpoints and uses \emph{JSON} \cite{IntroducingJSON}.
 
 \begin{description}
     \item[/recommender/] is reachable via a POST request and accepts a configuration state and preferences. Based on that a finished configuration is sent back as response.
@@ -54,7 +54,6 @@ The REST API defines the following Endpoints.
 The API is implemented with a minimal amount of functions and the recommender currently only supports one product at a time. However, the architecture is built in a way that it can be easily extended into supporting multiple products.
 The general architecture adheres to a \emph{model-view-controller} \cite{gamma2015design} inspired architecture.
 Data is stored and retrieved using \emph{data access objects}. Therefore, the currently used simple TinyDB database backend can be replaced with a different one easily.
-\todo[]{rest uses JSON}
 
 \section{Database}
 \label{sec:DesignImplementation:Database}
diff --git a/30_Thesis/thesis.bib b/30_Thesis/thesis.bib
index ad1ff26..35728b4 100644
--- a/30_Thesis/thesis.bib
+++ b/30_Thesis/thesis.bib
@@ -931,6 +931,13 @@ procedure.},
   file = {C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\9CJPCDKA\\configuration-solutions.html}
 }
 
+@online{IntroducingJSON,
+  title = {Introducing {{JSON}}},
+  url = {https://www.json.org/json-en.html},
+  urldate = {2020-05-09},
+  file = {C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\IJHHAP8I\\json-en.html}
+}
+
 @incollection{jamesonRecommendationGroups2007,
   title = {Recommendation to {{Groups}}},
   booktitle = {The {{Adaptive Web}}: {{Methods}} and {{Strategies}} of {{Web Personalization}}},
@@ -966,6 +973,13 @@ procedure.},
   file = {C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\3JN8DV3U\\griffin-groupthink-challenger.pdf}
 }
 
+@online{JSON,
+  title = {{{JSON}}},
+  url = {https://www.json.org/json-de.html},
+  urldate = {2020-05-09},
+  file = {C\:\\Users\\Hannes.Kuchelmeister\\Zotero\\storage\\2WIVRT7V\\json-de.html}
+}
+
 @software{junEugeneeeoTinyrecord2020,
   title = {Eugene-Eeo/Tinyrecord},
   author = {Jun, Eeo},