[1] [CITE@en[RFC 4975 - The Message Session Relay Protocol (MSRP)]]
( ([TIME[2012-02-26 13:20:50 +09:00]] 版))
<http://tools.ietf.org/html/rfc4975>

[2] [CITE@en[RFC 4976 - Relay Extensions for the Message Sessions Relay Protocol (MSRP)]]
( ([TIME[2014-10-18 23:44:47 +09:00]] 版))
<https://tools.ietf.org/html/rfc4976>

[3] [CITE@en[RFC 7977 - The WebSocket Protocol as a Transport for the Message Session Relay Protocol (MSRP)]]
([TIME[2016-10-04 23:50:28 +09:00]])
<https://tools.ietf.org/html/rfc7977>