This video shows how you can use literature from the stacks, the reading rooms, the texbook collection and e-books you found in the catalogue Regensburger Katalog plus.
Other tutorials mentioned in the video:
How do I find books?
How Do I Get Books that Are Not Available at University Library Regensburg? (Interlibrary Loan)
How Do I Get Journal Articles that I Found in "Articles & More"?