diff --git a/potentials/Cu_smf7.eam b/potentials/Cu_smf7.eam
index 655b11505d89639942371529cf11b275ae2b70c1..8c2dd462f46dd544bf3386d8862cb05346b4b2b7 100644
--- a/potentials/Cu_smf7.eam
+++ b/potentials/Cu_smf7.eam
@@ -1,4 +1,4 @@
-Cu functions for NiCu alloy (exponential Z)
+Cu functions for NiCu alloy (exponential Z) - S.M. Foiles, Phys. Rev. B 32, 7685 (1985)
    29      63.55         3.6150    FCC
   500  4.0080160320641114e-04  500  9.9198396793586663e-03  4.9499999999999886e+00
   0.                     -3.3986781077790695e-01 -5.5912870996080599e-01 -7.4102143617499650e-01 -9.0113352152164339e-01