APA (7th ed.) Citation

Han, S., Liu, W., & al, M. F. e. (2004). An efficient identity-based group signature scheme over elliptic curves. Springer.

Chicago Style (17th ed.) Citation

Han, Song, Wan-Quan Liu, and M Freire et al. An Efficient Identity-based Group Signature Scheme over Elliptic Curves. Springer, 2004.

MLA (9th ed.) Citation

Han, Song, et al. An Efficient Identity-based Group Signature Scheme over Elliptic Curves. Springer, 2004.