diff --git a/examples/config/phase/mechanical/elastic/Hooke_Al.yaml b/examples/config/phase/mechanical/elastic/Hooke_Al.yaml
index 6007f7695..fe2702c79 100644
--- a/examples/config/phase/mechanical/elastic/Hooke_Al.yaml
+++ b/examples/config/phase/mechanical/elastic/Hooke_Al.yaml
@@ -1,8 +1,18 @@
 type: Hooke
 references:
-  - J. Vallin et al.,
-    Journal of Applied Physics 35(6):1825-1826, 1964,
-    https://doi.org/10.1063/1.1713749
-C_11: 107.3e+9
-C_12: 60.8e+9
-C_44: 28.3e+9
+  - Kamm, G. N. & Alers, G. A.
+    Journal of Applied Physics, American Institute of Physics, 1964, 35, 327-330
+    https://doi.org/10.1063/1.1713309
+  - Gerlich, D. & Fisher, E. S.
+    Journal of Physics and Chemistry of Solids, 1969, 30, 1197-1205
+    https://doi.org/10.1016/0022-3697(69)90377-1
+T_ref: 300
+C_11: 106.1e+9
+C_11, T: -359.3e+5
+C_11, T^2: -152.7e+2
+C_12: 578.3e+8
+C_12, T: -781.6e+4
+C_12, T^2: -551.3e+1
+C_44: 243.1e+8
+C_44, T: -142.9e+5
+C_44, T^2: -404.6e+1