diff --git a/documents/hash_tables_refs.md b/documents/hash_tables_refs.md
index f73dd5d..a267c4a 100644
--- a/documents/hash_tables_refs.md
+++ b/documents/hash_tables_refs.md
@@ -28,6 +28,7 @@ uint64_t fold_128_to_64(uint128_t hash) {
 - [Martinus (Ankerl) — most widely used C++ implementation](https://github.com/martinus/unordered_dense)
 - [Tessil — clean header-only C++ implementation](https://github.com/Tessil/robin-map)
 - [Malte Skarupke — Robin Hood with probe count limit](https://github.com/skarupke/flat_hash_map)
+- [Robin Hood Hashing – Fairness in Collision Resolution](https://blog.hieunt.me/blog/robinhood-hashing)
 
 ## Robin Hood vs SwissTable