diff --git a/README.md b/README.md
index ae7e7d1..7ccedf9 100644
--- a/README.md
+++ b/README.md
@@ -400,6 +400,7 @@ func main() {
 
 # Reference
 - [about DAG](https://nave-kazu.hatenablog.com/entry/2015/11/30/154810)
+- [タスクの鳥瞰図を楽に(?)管理する](https://zenn.dev/openlogi/articles/a8edae5e9eb884)
 
 # Stargazers over time
 [![Stargazers over time](https://starchart.cc/ddddddO/gdag.svg?variant=adaptive)](https://starchart.cc/ddddddO/gdag)