diff --git "a/0_devops/1_theorie/Einf\303\274hrung.md" "b/0_devops/1_theorie/Einf\303\274hrung.md"
index 9a1df31..fe0ec28 100644
--- "a/0_devops/1_theorie/Einf\303\274hrung.md"
+++ "b/0_devops/1_theorie/Einf\303\274hrung.md"
@@ -5,7 +5,7 @@
 DevOps ist eine Kultur und Praktik, die auf den Prinzipien von Continuous Integration, Continuous Delivery, Automation, Lean, Measurement und Sharing (CALMS) basiert. Diese Prinzipien helfen dabei, die Zusammenarbeit zwischen Entwicklung (Development) und Betrieb (Operations) zu verbessern und die Softwarebereitstellung effizienter zu gestalten.
 
 
-## Wasserfall vs. DevOps
+## Wasserfall -> Agile -> DevOps
 
 ## Komplexität
 
@@ -13,21 +13,17 @@ DevOps ist eine Kultur und Praktik, die auf den Prinzipien von Continuous Integr
 ![DevOps Historie](../99_assets/images/devops-history.svg)
 
 
-Zitat: “It is not the strongest or the most intelligent who will survive but those who can best adapt to change.” Leon C. Megginson
+> “It is not the strongest or the most intelligent who will survive but those who can best adapt to change.” Leon C. Megginson
 
-Zitat: “DevOps, a movement of people who care about developing and operating reliable, secure, high performance systems at scale, has always — intentionally — lacked a definition or manifesto”. John Willis 
+> “DevOps, a movement of people who care about developing and operating reliable, secure, high performance systems at scale, has always — intentionally — lacked a definition or manifesto”. John Willis 
 
 ### Referenzen und weiterführende Links
 
-- [The Three Ways: The Principles Underpinning DevOps](https://itrevolution.com/the-three-ways-principles-underpinning-devops/)
-- [DevOps at Microsoft](https://learn.microsoft.com/en-us/devops/)
-- [CALMS: The DevOps Culture Model](https://www.atlassian.com/devops)
-
-
-
-//TODO: Slides einfügen
-Slides:
-Einführung:
-10 - 15 Wasserfall vs. DevOps
-16 - 23 Komplexität
+- [DevOps Days](https://devopsdays.org/)
+- [10 Deploys Per Day: Dev and Ops Cooperation at Flickr](https://www.youtube.com/watch?v=LdOe18KhtT4)
+- [Continuous Delivery: Reliable Software Releases through Build, Test, and Deployment Automation](https://www.goodreads.com/book/show/8686650-continuous-delivery)
+- [State of DevOps Report](https://puppet.com/resources/report/state-of-devops-report)
+- [The DevOps Handbook: How to Create World-Class Agility, Reliability, and Security in Technology Organizations](https://www.goodreads.com/book/show/26083308-the-devops-handbook)
+- [Accelerate: The Science of Lean Software and DevOps: Building and Scaling High Performing Technology Organizations](https://www.goodreads.com/book/show/39080433-accelerate)
+- [The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win](https://www.goodreads.com/book/show/17255186-the-phoenix-project)
 
diff --git a/0_devops/1_theorie/Fortgeschritten.md b/0_devops/1_theorie/Fortgeschritten.md
index 37d8bd1..42e8ae2 100644
--- a/0_devops/1_theorie/Fortgeschritten.md
+++ b/0_devops/1_theorie/Fortgeschritten.md
@@ -30,10 +30,16 @@
 
 
 ## PPT (People, Process, Technology)
-Zitat: “DevOps at a very high-level involves People, Process, and Products/Tools – and in that order intentionally.” John Willis
+> “DevOps at a very high-level involves People, Process, and Products/Tools – and in that order intentionally.” John Willis
 
 ## 24 Key Caps
 ![24 Key Caps](./../99_assets/images/24-key-caps.png)
 
 ### Referenzen und weiterführende Links
+- [CALMS: The DevOps Culture Model](https://www.atlassian.com/devops)
+- [The Three Ways: The Principles Underpinning DevOps](https://itrevolution.com/the-three-ways-principles-underpinning-devops/)
+- [The Phoenix Project: A Novel about IT, DevOps, and Helping Your Business Win](https://www.goodreads.com/book/show/17255186-the-phoenix-project)
 
+- [Accelerate: The Science of Lean Software and DevOps: Building and Scaling High Performing Technology Organizations](https://www.goodreads.com/book/show/39080433-accelerate)
+
+- [The DevOps Handbook: How to Create World-Class Agility, Reliability, and Security in Technology Organizations](https://www.goodreads.com/book/show/26083308-the-devops-handbook)