diff --git a/documents/hash_tables_refs.md b/documents/hash_tables_refs.md
index 3794223..84fded9 100644
--- a/documents/hash_tables_refs.md
+++ b/documents/hash_tables_refs.md
@@ -36,6 +36,10 @@ uint64_t fold_128_to_64(uint128_t hash) {
 - [Richter et al. (VLDB 2015)](https://bigdata.uni-saarland.de/publications/p249-richter.pdf)
 - [Poblete & Viola (2018)](https://www.cambridge.org/core/journals/combinatorics-probability-and-computing/article/abs/analysis-of-robin-hood-and-other-hashing-algorithms-under-the-random-probing-model/933D4F203E3C70EF15053287412242E0)
 
+## Hybrid Open-Addressing/Separate-Chaining
+
+- [Verstable](https://github.com/JacksonAllan/Verstable)
+
 ## Double Hashing
 
 - Knuth, TAOCP Vol. 3 §6.4 — definitive analysis of double hashing probe counts