APA (7th ed.) Citation

Becker, K. H., & Seydel, R. (1980). A Duffing equation with more than 20 Banach points. München.

Chicago Style (17th ed.) Citation

Becker, K. H., and Rüdiger Seydel. A Duffing Equation with More than 20 Banach Points. München: München, 1980.

MLA (9th ed.) Citation

Becker, K. H., and Rüdiger Seydel. A Duffing Equation with More than 20 Banach Points. München, 1980.

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