diff --git a/website/docs/resources/readings.md b/website/docs/resources/readings.md
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@@ -62,6 +62,9 @@
 - Andrew Miller, Michael Hicks, Jonathan Katz, and Elaine Shi.
   [*Authenticated Data Structures, Generically*](https://www.cs.umd.edu/~mwh/papers/gpads.pdf).
   POPL 2014.
+- Gilles Barthe, Marco Gaboardi, Emilio Jesús Gallego Arias, Justin Hsu, Aaron Roth, Pierre-Yves Strub
+  [*Higher-Order Approximate Relational Refinement Types for Mechanism Design and Differential Privacy*](https://arxiv.org/pdf/1407.6845.pdf).
+  POPL 2015.
 - Samee Zahur and David Evans.
   [*Obliv-C: A Language for Extensible Data-Oblivious Computation*](https://eprint.iacr.org/2015/1153.pdf).
   IACR 2015.