add some credits on README

diff --git a/README.md b/README.md
index dc5fa2ed7d5e4aa63ab7a08e164699c78340b010..a5d003d294ee7645d69485bc770a89ed0eae726a 100644 (file)
--- a/README.md
+++ b/README.md
@@ -152,6 +152,12 @@ See the [contribution guide](https://github.com/jpbruyere/vkvg/blob/master/CONTR
 
 Join us on [gitter](https://gitter.im/CSharpRapidOpenWidgets) for any question.
 
+## Addtitional Credits
+
+vkvg use the [AGG's project](http://antigrain.com/) recursive bezier which is kindly exposed [here](http://agg.sourceforge.net/antigrain.com/research/adaptive_bezier/index.html).
+I've learned Vulkan with the help of the excellent [Sacha Willems's vulkan examples](https://github.com/SaschaWillems/Vulkan).
+The 2d affine matrix implementation follows Cairo's one.
+
 ## Change log
 
 * v0.2.0