diff --git a/README.md b/README.md
index 77b4d5a..59f9e53 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@
 - Quartic easings: `quartInOut`, `quartIn`, `quartOut`
 - Quintic easings: `quintInOut`, `quintIn`, `quintOut`
 
-## Usage (example)
+## Demo/Usage
 
 ```js
 import * as easings from 'https://deno.land/x/easings/easings.ts';
@@ -54,4 +54,10 @@ Output:
 ********************
 ********************
 ********************
-```
\ No newline at end of file
+```
+
+## More on easing
+[Easing Graphs / D3 / Observable](https://observablehq.com/@d3/easing)*  
+[Easing Animations / D3 / Observable](https://observablehq.com/@d3/easing-animations)*  
+
+\*Note that [D3](https://github.com/d3/d3-ease) has a slightly different API