diff --git a/Go2GenericsFeedback.md b/Go2GenericsFeedback.md
index 3567e7c9..93344b90 100644
--- a/Go2GenericsFeedback.md
+++ b/Go2GenericsFeedback.md
@@ -19,6 +19,8 @@ As the amount of feedback grows, please feel free to organize or reorganize this
 
 ## Supplemental (supporting with modifications)
 
+- Herbert Dürr, "[Contract Switches to Steer Types to Common Outcomes](https://gist.github.com/hdu-hh/78ca8d3a40bda996c91ce9c1f558337c)", July 2019
+
 - Tom Levy, "[Go 2 Generics Feedback](https://gist.github.com/tom93/fd8c500b8a1d2d94f227e1e108d5315b)", June 2019
 
 - Ole Bulbuk, "[Why Go Contracts Are A Bad Idea In The Light Of A Changing Go Community](https://flowdev.github.io/2019/04/02/why-go-contracts-are-a-bad-idea-in-the-light-of-a-changing-go-community/)", April 2019