diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -237,5 +237,6 @@ Please note that (some) models and textures use separate licenses. Please comply
 ## External resources
 - [LunarG Vulkan SDK](https://vulkan.lunarg.com)
 - [Official list of Vulkan resources](https://www.khronos.org/vulkan/resources)
+- [Vulkan API specifications](https://www.khronos.org/registry/vulkan/specs/1.0/apispec.html) ([quick reference cards](https://www.khronos.org/registry/vulkan/specs/1.0/refguide/Vulkan-1.0-web.pdf))
 - [SPIR-V specifications](https://www.khronos.org/registry/spir-v/specs/1.0/SPIRV.html)
 - [My personal view on Vulkan (as a hobby developer)](http://www.saschawillems.de/?p=1886)