diff --git a/guide/english/agile/actual-time-estimation/index.md b/guide/english/agile/actual-time-estimation/index.md
index 61a05b383e..b601a65380 100644
--- a/guide/english/agile/actual-time-estimation/index.md
+++ b/guide/english/agile/actual-time-estimation/index.md
@@ -47,9 +47,10 @@ Or…
 
 ### More Information:
 
-- [Agile Constraints](http://www.brighthubpm.com/agile/50212-the-agile-triangle-value-quality-and-constraints/)
+- [Agile Constraints](http://www.brighthubpm.com/agile/50212-the-agile-triangle-value-quality-and-constraints/) 
 
-- [How do you estimate on an Agile project?](http://info.thoughtworks.com/rs/thoughtworks2/images/twebook-perspectives-estimation_1.pdf)
+- [How do you estimate on an Agile project?](http://info.thoughtworks.com/rs/thoughtworks2/images/twebook-perspectives-estimation_1.pdf)  
+- [The secrets behind story points and agile estimation](https://www.atlassian.com/agile/project-management/estimation)
 
 My addition
 -[The Theory of Constraints in Agile](https://www.leadingagile.com/2018/03/the-theory-of-constraints-in-agile/)