Natori, Michihiro. "Jointed Extendible Truss Beam." U.S. Patent number 4655022. Washington DC: United States Patent and Trademark Office, 1987.

Natori, Michihiro. "Jointed Extendible Truss Beam." U.S. Patent number 4655022. Washington DC: United States Patent and Trademark Office, 1987.