diff --git a/server/kernel/data/frames.xml b/server/kernel/data/frames.xml
index 48881fd..bd71202 100644
--- a/server/kernel/data/frames.xml
+++ b/server/kernel/data/frames.xml
@@ -496,7 +496,7 @@
 				Heliocentric Inertial
 			</fullname>
 			<description>
-   The Heliocentric Inertial Frame is defined as follows (from [3]):
+   The Heliocentric Inertial Frame is defined as follows :
 
     -  X-Y plane is defined by the Sun's equator of epoch J2000: the +Z
        axis, primary vector, is parallel to the Sun's rotation axis of
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