APA (7th ed.) Citation

Hamburger, C. (1989). Regularity of differential forms minimizing degenerate elliptic functionals. [publisher not identified].

Chicago Style (17th ed.) Citation

Hamburger, Christoph. Regularity of Differential Forms Minimizing Degenerate Elliptic Functionals. Bonn: [publisher not identified], 1989.

MLA (9th ed.) Citation

Hamburger, Christoph. Regularity of Differential Forms Minimizing Degenerate Elliptic Functionals. [publisher not identified], 1989.