diff --git a/articles/Normal distribution - Wikipedia/Normal distribution - Wikipedia.pdf.txt b/articles/Normal distribution - Wikipedia/Normal distribution - Wikipedia.pdf.txt
new file mode 100644
index 0000000..aff06e6
--- /dev/null
+++ b/articles/Normal distribution - Wikipedia/Normal distribution - Wikipedia.pdf.txt	
@@ -0,0 +1 @@
+https://en.wikipedia.org/w/index.php?title=Normal_distribution&oldid=1211233582
diff --git a/articles/Normal distribution - Wikipedia/Normal distribution - Wikipedia.xopp.xml b/articles/Normal distribution - Wikipedia/Normal distribution - Wikipedia.xopp.xml
new file mode 100644
index 0000000..723d935
--- /dev/null
+++ b/articles/Normal distribution - Wikipedia/Normal distribution - Wikipedia.xopp.xml	
@@ -0,0 +1,127 @@
+<?xml version="1.0" standalone="no"?>
+<xournal creator="Xournal++ 1.1.3" fileversion="4">
+  <title>Xournal++ document - see https://github.com/xournalpp/xournalpp</title>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" domain="absolute" filename="/home/benjamin/Desktop/bens_folder/school/ens/asp/aria/internship/work/articles/Normal distribution - Wikipedia/Normal distribution - Wikipedia.pdf" pageno="1"/>
+    <layer>
+      <stroke tool="highlighter" color="#ffff007f" width="8.50000000" fill="128">49.38316660 73.95869484 201.25710814 73.95869484</stroke>
+      <stroke tool="highlighter" color="#ffff007f" width="8.50000000" fill="128">180.32047492 101.07208756 267.38335759 101.07208756</stroke>
+      <stroke tool="highlighter" color="#ffff007f" width="8.50000000" fill="128">489.23975416 150.60351663 500.55905177 151.10334917</stroke>
+      <stroke tool="highlighter" color="#ffff007f" width="8.50000000" fill="128">488.73563404 173.68375920 503.72854185 171.42041419</stroke>
+      <stroke tool="highlighter" color="#ffff007f" width="8.50000000" fill="128">332.33143200 578.02951277 353.10578149 576.88871021</stroke>
+      <stroke tool="highlighter" color="#ffff007f" width="8.50000000" fill="128">415.25359351 577.98946160 415.25359351 577.98946160</stroke>
+    </layer>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="2"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="3"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="4"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="5"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="6"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="7"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="8"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="9"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="10"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="11"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="12"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="13"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="14"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="15"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="16"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="17"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="18"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="19"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="20"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="21"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="22"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="23"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="24"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="25"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="26"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="27"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="28"/>
+    <layer/>
+  </page>
+  <page width="596.00000000" height="842.00000000">
+    <background type="pdf" pageno="29"/>
+    <layer/>
+  </page>
+</xournal>