diff --git a/docbook/entities.xml b/docbook/entities.xml
index fd88da4b3ac..1f6732810de 100644
--- a/docbook/entities.xml
+++ b/docbook/entities.xml
@@ -99,3 +99,8 @@
 <!ENTITY rfc3261 "<ulink url='http://www.ietf.org/rfc/rfc3261.txt'>RFC3261</ulink>">
 <!ENTITY rfc822 "<ulink url='http://www.ietf.org/rfc/rfc822.txt'>RFC822</ulink>">
 <!ENTITY rfc2543 "<ulink url='http://www.ietf.org/rfc/rfc2543.txt'>RFC2543</ulink>">
+<!ENTITY rfc5626 "<ulink url='http://www.ietf.org/rfc/rfc5626.txt'>RFC5626</ulink>">
+
+<!-- Often used 3rd party libraries  -->
+<!ENTITY openssl "<ulink url='https://www.openssl.org'>OpenSSL</ulink>">
+<!ENTITY curl "<ulink url='https://curl.haxx.se'>Curl</ulink>">
diff --git a/modules/outbound/doc/outbound_admin.xml b/modules/outbound/doc/outbound_admin.xml
index de3d6590083..842bfdc73cd 100644
--- a/modules/outbound/doc/outbound_admin.xml
+++ b/modules/outbound/doc/outbound_admin.xml
@@ -16,7 +16,7 @@
 	<section>
 	<title>Overview</title>
 	<para>This module provides C-API functions to enable &kamailio; to be
-	used as an outbound Edge Proxy (see RFC 5626 section 5).</para>
+	used as an outbound Edge Proxy (see &rfc5626; section 5).</para>
 	<para>The <emphasis>path</emphasis> and <emphasis>rr</emphasis> will
 	bind to this module if it is loaded before they are.</para>
 	<section>
@@ -463,7 +463,7 @@ event_route[tm:branch-failure:FAIL-BRANCH] {
 		&kamailio; with this module loaded:
 		<itemizedlist>
 		<listitem>
-		<para><emphasis>OpenSSL</emphasis>.</para>
+		<para><emphasis>&openssl;</emphasis>.</para>
 		</listitem>
 		</itemizedlist>
 		</para>