diff --git a/constantine/arithmetic/README.md b/constantine/arithmetic/README.md
index 081ea25..dc01271 100644
--- a/constantine/arithmetic/README.md
+++ b/constantine/arithmetic/README.md
@@ -3,3 +3,14 @@
 This folder contains the implementation of
 - big integers
 - finite field arithmetic (i.e. modular arithmetic)
+
+## References
+
+- Montgomery Arithmetic from a Software Perspective\
+  Joppe W. Bos and Peter L. Montgomery, 2017\
+  https://eprint.iacr.org/2017/1057
+
+- Arithmetic of Finite Fields\
+  Chapter 5 of Guide to Pairing-Based Cryptography\
+  Jean Luc Beuchat, Luis J. Dominguez Perez, Sylvain Duquesne, Nadia El Mrabet, Laura Fuentes-Castañeda, Francisco Rodríguez-Henríquez, 2017\
+  https://www.researchgate.net/publication/319538235_Arithmetic_of_Finite_Fields
diff --git a/constantine/tower_field_extensions/README.md b/constantine/tower_field_extensions/README.md
index d46b1c2..a0098d1 100644
--- a/constantine/tower_field_extensions/README.md
+++ b/constantine/tower_field_extensions/README.md
@@ -75,6 +75,11 @@ From Ben Edgington, https://hackmd.io/@benjaminion/bls12-381
   Sylvain Duquesne and Nadia El Mrabet and Safia Haloui and Franck Rondepierre, 2015\
   https://eprint.iacr.org/2015/1212
 
+- Arithmetic of Finite Fields\
+  Chapter 5 of Guide to Pairing-Based Cryptography\
+  Jean Luc Beuchat, Luis J. Dominguez Perez, Sylvain Duquesne, Nadia El Mrabet, Laura Fuentes-Castañeda, Francisco Rodríguez-Henríquez, 2017\
+  https://www.researchgate.net/publication/319538235_Arithmetic_of_Finite_Fields
+
 ### Presentations
 
 - BLS12-381 For The Rest Of Us\