diff --git a/doc/using_postgis_dataman.xml b/doc/using_postgis_dataman.xml
index 15802f4da..78dec985b 100644
--- a/doc/using_postgis_dataman.xml
+++ b/doc/using_postgis_dataman.xml
@@ -1586,9 +1586,9 @@ AND ST_Relate(a.geom, b.geom, '102101FF2');
Dimensionally
Extended Nine-Intersection Model (DE-9IM) by Christian Strobl
-
+
GeoTools: Dimensionally Extended Nine-Intersection Matrix
-
+
Encyclopedia of GIS By Hui Xiong