diff --git a/docs.it4i/general/energy.md b/docs.it4i/general/energy.md
index bfd076cc25d8ab75b09fef3634f27a9afbfe9fab..a45dfb65884fcfd8e61042b4f80b66ec9298c2c8 100644
--- a/docs.it4i/general/energy.md
+++ b/docs.it4i/general/energy.md
@@ -44,5 +44,5 @@ None implemented yet.
 None implemented yet.
 
 [1]: https://en.wikipedia.org/wiki/Roofline_model
-[2]: https://people.eecs.berkeley.edu/~kubitron/cs252/handouts/papers/RooflineVyNoYellow.pdf
+[2]: https://dl.acm.org/doi/10.1145/1498765.1498785
 [3]: https://slovnik.seznam.cz/preklad/anglicky_cesky/capping