diff --git a/examples/config/phase/mechanical/plastic/phenopowerlaw_Al.yaml b/examples/config/phase/mechanical/plastic/phenopowerlaw_Al.yaml
index 68c51cdea..1ec5b8dc5 100644
--- a/examples/config/phase/mechanical/plastic/phenopowerlaw_Al.yaml
+++ b/examples/config/phase/mechanical/plastic/phenopowerlaw_Al.yaml
@@ -4,19 +4,16 @@ references:
   - W.F. Hosford et al.,
     Acta Metallurgica 8(3):187-199, 1960,
     https://doi.org/10.1016/0001-6160(60)90127-9,
-    fitted from Fig. 5
-  - U.F. Kocks,
-    Metallurgical and Materials Transactions B 1:1121–1143, 1970,
-    https://doi.org/10.1007/BF02900224
+    fitted from Fig. 5 ([111] and [001])
 
 output: [xi_sl, gamma_sl]
 
 N_sl: [12]
 
 n_sl: 20
-a_sl: 3.1
-h_0_sl-sl: 1.7e+8
-xi_0_sl: [5.0e+6]
-xi_inf_sl: [37.5e+6]
-h_sl-sl: [1, 1, 1.4, 1.4, 1.4, 1.4, 1.4]
+a_sl: 5.4
+h_0_sl-sl: 281.5e+6
+xi_0_sl: [2.69e+6]
+xi_inf_sl: [67.5e+6]
+h_sl-sl: [1, 1, 5.123, 0.574, 1.123, 1.123, 1]
 dot_gamma_0_sl: 7.5e-5
diff --git a/examples/config/phase/mechanical/plastic/phenopowerlaw_Cu.yaml b/examples/config/phase/mechanical/plastic/phenopowerlaw_Cu.yaml
index 223495d26..ebc8afd21 100644
--- a/examples/config/phase/mechanical/plastic/phenopowerlaw_Cu.yaml
+++ b/examples/config/phase/mechanical/plastic/phenopowerlaw_Cu.yaml
@@ -1,22 +1,19 @@
 type: phenopowerlaw
 
 references:
-  - T Takeuchi,
+  - T. Takeuchi,
     Transactions of the Japan Institute of Metals 16(10):629-640, 1975,
     https://doi.org/10.2320/matertrans1960.16.629,
-    fitted from Fig. 3b
-  - U.F. Kocks,
-    Metallurgical and Materials Transactions B 1:1121–1143, 1970,
-    https://doi.org/10.1007/BF02900224
+    fitted from Fig. 3b ([111] and [001])
 
 output: [xi_sl, gamma_sl]
 
 N_sl: [12]
 
 n_sl: 20
-a_sl: 1.0
-h_0_sl-sl: 2.4e+8
-xi_0_sl: [1.5e+6]
-xi_inf_sl: [112.5e+6]
-h_sl-sl: [1, 1, 1.4, 1.4, 1.4, 1.4, 1.4]
+a_sl: 0.6
+h_0_sl-sl: 3.5e+8
+xi_0_sl: [1.6e+6]
+xi_inf_sl: [96.4e+6]
+h_sl-sl: [1, 1, 5.123, 0.574, 1.123, 1.123, 1]
 dot_gamma_0_sl: 3.e-3