diff --git a/README.md b/README.md
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@@ -66,6 +66,11 @@ The default is  `fast_float::chars_format::general` which allows both `fixed` an
 
 We support Visual Studio, macOS, Linux, freeBSD. We support big and little endian. We support 32-bit and 64-bit systems.
 
+## Reference
+
+- Daniel Lemire, [Number Parsing at a Gigabyte per Second](https://arxiv.org/abs/2101.11408), arXiv:2101.11408
+
+
 ## Other programming languages
 
 - [There is a Rust port of the fast_float library](https://github.com/aldanor/fast-float-rust/) called `fast-float-rust`.