diff --git a/bibliography.bib b/bibliography.bib
index d3819a7..47df644 100644
--- a/bibliography.bib
+++ b/bibliography.bib
@@ -108,3 +108,20 @@
 	year = {2023},
 	url = {https://bildungsserver.berlin-brandenburg.de/fileadmin/bbb/unterricht/rahmenlehrplaene/Rahmenlehrplanprojekt/amtliche_Fassung/getrennt_2023/BB_RLP_2023_Teil_C_Ma_GenF_1.pdf},
 }
+
+@misc{kit-2022,
+  author       = {{Karlsruher Institut f{\"u}r Technologie (KIT)}},
+  title        = {Galton-Brett},
+  year         = {2022},
+  howpublished = {\url{https://didaktik.math.kit.edu/downloads/Labor/Online-Labor/galtonbrett.pdf}},
+  note         = {Abgerufen am 02.07.2026}
+}
+
+@book{pearl-mackenzie-2018,
+  author    = {Judea Pearl and Dana Mackenzie},
+  title     = {The Book of Why: The New Science of Cause and Effect},
+  year      = {2018},
+  publisher = {Basic Books},
+  address   = {New York},
+  isbn      = {978-0-465-09760-9}
+}