diff --git a/idiom/functional-options.md b/idiom/functional-options.md
index 1e95086..77a7ebc 100644
--- a/idiom/functional-options.md
+++ b/idiom/functional-options.md
@@ -92,3 +92,10 @@ if err != nil {
     panic(err)
 }
 ```
+
+## Relative
+
+Relative links and source codeview that helps you understand how this pattern works and  can be extended to fit your needs:
+
+- [go-options](https://github.com/kataras/go-options)
+- A web framework's flow: [configuration.go:26](https://github.com/kataras/iris/blob/master/configuration.go#L26), [configuration.go:160](https://github.com/kataras/iris/blob/master/configuration.go#L160), [iris.go:202](https://github.com/kataras/iris/blob/master/iris.go#L202), [iris.go:259](https://github.com/kataras/iris/blob/master/iris.go#L259)