diff --git a/src/assets/pdfs/OOD-DiskANN-2022.pdf b/src/assets/pdfs/OOD-DiskANN-2022.pdf
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diff --git a/src/databases/vectordb/diskann.md b/src/databases/vectordb/diskann.md
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@@ -43,6 +43,7 @@ DiskANN 通过 BeamSearch(设置 beamwidth 一次读多个数据块) 和缓存
 ### Further readings
 
 - [FreshDiskANN: A Fast and Accurate Graph-Based ANN Index for Streaming Similarity Search](/assets/pdfs/FreshDiskANN_2021.pdf), 2021
+- [OOD-DiskANN: Efficient and Scalable Graph ANNS for Out-of-Distribution Queries](/assets/pdfs/OOD-DiskANN-2022.pdf), 2022
 
 #### References: