Index: trunk/BNC/src/bnchelp.html
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--- trunk/BNC/src/bnchelp.html	(revision 5353)
+++ trunk/BNC/src/bnchelp.html	(revision 5354)
@@ -2257,5 +2257,5 @@
 
 <p>
-<u>DREF91:</u> The formulas for the transformation 'ITRF2008-&gt;DREF91' are provided by Peter Franke, BKG. The following 14 Helmert Transformation Parameters were introduced:
+<u>DREF91:</u> 'Referenzkoordinaten für SAPOS, Empfehlungen der Projektgruppe SAPOS-Koordinatenmonitoring 2008', Personal communication with Peter Franke, BKG, Germany. The following 14 Helmert Transformation Parameters were introduced: 
 </p>
 <p>