APA (7th ed.) Citation

Li, S., Teo, K. L., & Yang, X. (2005). Second-Order Directional Derivatives of Spectral Functions. Pergamon.

Chicago Style (17th ed.) Citation

Li, S., Kok Lay Teo, and X. Yang. Second-Order Directional Derivatives of Spectral Functions. Pergamon, 2005.

MLA (9th ed.) Citation

Li, S., et al. Second-Order Directional Derivatives of Spectral Functions. Pergamon, 2005.