On Layered VPN Architecture for Enabling User-Based Multiply Associated VPNs. - Yoshihiro Hara; Hiroyuki Ohsaki; Makoto Imase; Yoshitake Tajima; Masahiro Maruyoshi; Junichi Murayama (ICOIN, 2004)

A Prototype Implementation of VPN Enabling User-based Multiple Association. - Osamu Honda; Hiroyuki Ohsaki; Makoto Imase; Yoshihiro Hara; Masahiro Maruyoshi; Kazuhiro Matsuda (IMSA, 2005)