APA (7th ed.) Citation

Gonera, J., Kosinski, P., & Piwnik, J. (2021). Fermat's principle in constant gravitational field.

Chicago Style (17th ed.) Citation

Gonera, Joanna, Piotr Kosinski, and Joanna Piwnik. Fermat's Principle in Constant Gravitational Field. 2021.

MLA (9th ed.) Citation

Gonera, Joanna, et al. Fermat's Principle in Constant Gravitational Field. 2021.