diff --git a/README.md b/README.md
index 326fbef..3b55ae0 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
 
-Immediate Mode GUI app with naive visualisation for elastic balls collisions.
+Immediate Mode GUI app with naive visualization for elastic balls collisions.
 
 # Build & run 
 
@@ -8,6 +8,12 @@ curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh # install rust
 cargo run --package=egui-circles                               # build & run
 ```
 
-# HowTo
+# Acknowledgments
 
-Detailed information on how to use [egui](https://github.com/emilk/egui) rust library can found [here](https://egui.info/).  
\ No newline at end of file
+### ImGui
+
+Detailed information on how to use [egui](https://github.com/emilk/egui) rust library can found [here](https://egui.info/).
+
+### Math
+
+A simple explanation of [2D vector math](https://gitea.djmil.dev/djmil/egui-circles/wiki/raw/Collisions2D.pdf), silently working behind the scene of the collisions simulation.