diff --git a/conf/glances-monitor.conf b/conf/glances-monitor.conf
index dc991e34..55456601 100644
--- a/conf/glances-monitor.conf
+++ b/conf/glances-monitor.conf
@@ -20,6 +20,7 @@ iowait_warning=60
 iowait_critical=80
 # Limit values for CPU steal in %
 # Default values if not defined: 10/15/20
+# Source: http://blog.scoutapp.com/articles/2013/07/25/understanding-cpu-steal-time-when-should-you-be-worried
 steal_careful=10
 steal_warning=15
 steal_critical=20
diff --git a/conf/glances.conf b/conf/glances.conf
index 608b7a0d..ea296bb5 100644
--- a/conf/glances.conf
+++ b/conf/glances.conf
@@ -20,6 +20,7 @@ iowait_warning=60
 iowait_critical=80
 # Limit values for CPU steal in %
 # Default values if not defined: 10/15/20
+# Source: http://blog.scoutapp.com/articles/2013/07/25/understanding-cpu-steal-time-when-should-you-be-worried
 steal_careful=10
 steal_warning=15
 steal_critical=20