diff --git a/general_docs/bibliography.bib b/general_docs/bibliography.bib
index 0db39dc4..8aa23cf0 100644
--- a/general_docs/bibliography.bib
+++ b/general_docs/bibliography.bib
@@ -54,6 +54,23 @@ @Book{protobuf
   year      = {2008-07},
 }
 
+@Book{wiki_rotation_matrix,
+  publisher = {https://en.wikipedia.org/wiki/Rotation_matrix.},
+  title     = {Rotation Matrix.},
+  year      = {2022-01},
+}
+
+@Book{wiki_euler_angles,
+  publisher = {https://en.wikipedia.org/wiki/Euler_angles.},
+  title     = {Protocol Buffers.},
+  year      = {2022-01},
+}
+
+@Book{reuper2020,
+  publisher = {Reuper.},
+  title     = {Multi-Frequency GNSS Sensor Fusion With Quality Assessment for Automotive Applications.},
+  year      = {2020},
+}
 
 
 @Comment{jabref-meta: databaseType:bibtex;}
\ No newline at end of file