The following publications are possibly variants of this publication:
- HTTP-Enabled Location Delivery (HELD)Mary Barnes. rfc, 5985:1-39, September 2010. [doi]
- A Location Dereference Protocol Using HTTP-Enabled Location Delivery (HELD)James Winterbottom, Hannes Tschofenig, Henning Schulzrinne, Martin Thomson. rfc, 6753:1-25, October 2012. [doi]
- A Routing Request Extension for the HTTP-Enabled Location Delivery (HELD) ProtocolJames Winterbottom, Hannes Tschofenig, Laura Liess. rfc, 7840:1-16, May 2016. [doi]