added figures to framework and

doc/bachelorarbeit_EstherKleinhenz/references/References_2.bib

@@ -26,18 +26,30 @@
    note = "https://django-taggit.readthedocs.io/en/latest/getting\_started" 
    }
    
-   @article{Herzog,
+  @article{Herzog,
    author = "Stephan Herzog",
    title = "Model View Controller, Model View Presenter, and Model View ViewModel Design Patterns",
    year = "2016",
    note = "https://medium.com/sthzg/a-short-exploration-of-django-taggit-bb869ea5051f" 
    }
    
-   @article{King,
+  @article{King,
    author = "Adam King",
    title = "Django Middlewares and the Request/Response Cycle",
    year = "2017",
    note = "https://medium.com/zeitcode/django-middlewares-and-the-request-response-cycle-fcbf8efb903f" 
    }
    
-   
+  @article{Python,
+   author = "Python Software Foundation",
+   title = "Virtual Environments and Packages",
+   year = "2018",
+   note = "https://docs.python.org/3/tutorial/venv.html" 
+   }
+   
+  @article{Dixit,
+   author = "Chitrank Dixit",
+   title = "PEP-8 Tutorial: Code Standards in Python",
+   year = "2018",
+   note = "https://www.datacamp.com/community/tutorials/pep8-tutorial-python-code" 
+   }