diff --git a/img/referenz2.svg b/img/referenz2.svg
new file mode 100644
index 0000000..4aff491
--- /dev/null
+++ b/img/referenz2.svg
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
+<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" version="1.1" width="2155px" height="908px" viewBox="-0.5 -0.5 2155 908" content="&lt;mxfile host=&quot;app.diagrams.net&quot; modified=&quot;2020-04-21T15:31:11.995Z&quot; agent=&quot;5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.163 Safari/537.36&quot; etag=&quot;D-CFmulK_ejtJpOjwD4H&quot; version=&quot;12.9.14&quot; type=&quot;google&quot;&gt;&lt;diagram name=&quot;Page-1&quot; id=&quot;e7e014a7-5840-1c2e-5031-d8a46d1fe8dd&quot;&gt;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&lt;/diagram&gt;&lt;/mxfile&gt;" style="background-color: rgb(255, 255, 255);"><defs/><g><rect x="0" y="40" width="1200" height="300" rx="45" ry="45" fill="#ffffff" stroke="#000000" stroke-width="5" pointer-events="all"/><g transform="translate(-0.5 -0.5)scale(5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe flex-start; width: 238px; height: 1px; padding-top: 38px; margin-left: 2px;"><div style="box-sizing: border-box; font-size: 0; text-align: left; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><font style="font-size: 19px"><b>   Henri</b></font></div></div></div></foreignObject><text x="2" y="42" fill="#000000" font-family="Helvetica" font-size="12px">   Henri</text></switch></g><rect x="0" y="440" width="1200" height="300" rx="45" ry="45" fill="#ffffff" stroke="#000000" stroke-width="5" pointer-events="all"/><g transform="translate(-0.5 -0.5)scale(5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; 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text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 98px; height: 1px; padding-top: 38px; margin-left: 131px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><font style="font-size: 19px"><b style="background-color: rgb(255 , 0 , 0)">Referenz</b></font></div></div></div></foreignObject><text x="180" y="42" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">Referenz</text></switch></g><rect x="1625" y="2.5" width="525" height="375" rx="56.25" ry="56.25" fill="#ffffff" stroke="#000000" stroke-width="5" pointer-events="all"/><g transform="translate(-0.5 -0.5)scale(5)"><switch><foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"><div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 103px; height: 1px; padding-top: 38px; margin-left: 326px;"><div style="box-sizing: border-box; font-size: 0; text-align: center; "><div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: #000000; line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; "><font style="font-size: 14px">:Henri</font><hr style="font-size: 14px" /><font style="font-size: 14px">- age : 0</font></div></div></div></foreignObject><text x="378" y="42" fill="#000000" font-family="Helvetica" font-size="12px" text-anchor="middle">:Henri- age : 0</text></switch></g><rect x="1450" y="530" width="525" height="375" rx="56.25" ry="56.25" fill="#ffffff" stroke="#000000" stroke-width="5" pointer-events="all"/><g transform="translate(-0.5 -0.5)scale(5)"><switch><foreignObject style="overflow: visible; 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\ No newline at end of file
diff --git a/referenzvariablen.md b/referenzvariablen.md
index 11f019e..c64ee61 100644
--- a/referenzvariablen.md
+++ b/referenzvariablen.md
@@ -29,4 +29,6 @@ Person Eva = new Person(0);
 ```java
 boolean bool1 = Eva == Henri;
 boolean bool2 = Eva.equals(Henri);
-```
\ No newline at end of file
+```
+
+![bg 50%](https://git.haw-hamburg.de/pm1-tutorium/slides/-/raw/master/img/referenz2.PNG)
\ No newline at end of file