diff --git a/README.md b/README.md
index b438f98..b163b32 100644
--- a/README.md
+++ b/README.md
@@ -70,8 +70,7 @@ We support Visual Studio, macOS, Linux, freeBSD. We support big and little endia
 
 ## Reference
 
-- Daniel Lemire, [Number Parsing at a Gigabyte per Second](https://arxiv.org/abs/2101.11408), Software: Pratice and Experience (to appear)
-
+- Daniel Lemire, [Number Parsing at a Gigabyte per Second](https://arxiv.org/abs/2101.11408), Software: Pratice and Experience 51 (8), 2021.
 
 ## Other programming languages