APA (7th ed.) Citation

Brock, F., Ferrone, V., & Kawohl, B. (1995). A symmetry problem in the calculus of variations. IWR.

Chicago Style (17th ed.) Citation

Brock, Friedemann, Vincenzo Ferrone, and Bernhard Kawohl. A Symmetry Problem in the Calculus of Variations. Heidelberg: IWR, 1995.

MLA (9th ed.) Citation

Brock, Friedemann, et al. A Symmetry Problem in the Calculus of Variations. IWR, 1995.