Freese, R. W., Cho, Y. J., Boriotti, S., & Dennis, D. (2001). Geometry of linear 2-normed spaces. Nova Science Publishers.

Freese, Raymond W., Yeol Je Cho, Susan Boriotti, and Donna Dennis. Geometry of Linear 2-normed Spaces. Huntington, N.Y.: Nova Science Publishers, 2001.

Freese, Raymond W., et al. Geometry of Linear 2-normed Spaces. Nova Science Publishers, 2001.