Overview of IP Multicast in a Multi-Protocol Label Switching (MPLS) Environment. - Dirk Ooms; Bernard Sales; Wim Livens; Arup Acharya; Frédéric Griffoul; Furquan Ansari (RFC, 2002)

Explicit Multicast (Xcast) Concepts and Options. - Richard H. Boivie; Nancy K. Feldman; Yuji Imai; Wim Livens; Dirk Ooms (RFC, 2007)