APA (7th ed.) Citation

Alday, L., Maldacena, J., Sever, A., & Vieira, P. (2010). Y-system for scattering amplitudes.

Chicago Style (17th ed.) Citation

Alday, L., J. Maldacena, A. Sever, and P. Vieira. Y-system for Scattering Amplitudes. 2010.

MLA (9th ed.) Citation

Alday, L., et al. Y-system for Scattering Amplitudes. 2010.