diff --git a/lit.bib b/lit.bib
index 610479540bac88e7135f22da26f12a1a2f494579..89becf791053ae9d41efde86792e2d4c8a9c76f8 100644
--- a/lit.bib
+++ b/lit.bib
@@ -60,3 +60,10 @@ year={2018},
 publisher={Blurb},
 url = {https://bartoszmilewski.com/2014/10/28/}
 }
+
+@website{rivalsummary,
+title={Algebra of Programming -- A Rival Summary},
+author={Guthmann, Florian},
+year={2024},
+url={https://wwwcip.cs.fau.de/~oc45ujef/lectures/algprog/summary.html}
+}
\ No newline at end of file