APA (7th ed.) Citation

SpringerLink (Online service), Lang, S., & Jorgenson, J. Posn(R) and eisenstein series.

Chicago Style (17th ed.) Citation

SpringerLink (Online service), Serge Lang, and Jay Jorgenson. Posn(R) and Eisenstein Series.

MLA (8th ed.) Citation

SpringerLink (Online service), et al. Posn(R) and Eisenstein Series.

Warning: These citations may not always be 100% accurate.