1 files changed, 1 insertions, 0 deletions
diff --git a/README.md b/README.md
index c78c462..b9d7923 100644
--- a/README.md
+++ b/README.md
@@ -15,3 +15,4 @@ This model uses tips and tricks from the following sources:
 1. [Guide to Elliptic Curve Cryptography](http://diamond.boisestate.edu/~liljanab/MATH308/GuideToECC.pdf)
 2. [Ultra High Performance ECC over NIST Primes
 on Commercial FPGAs](https://www.iacr.org/archive/ches2008/51540064/51540064.pdf)
+3. [Constant Time Modular Inversion](http://joppebos.com/files/CTInversion.pdf)