APA (7th ed.) Citation

Bona, A., & Slawinski, M. (2003). Fermat's principle for seismic rays in elastic media. Elsevier.

Chicago Style (17th ed.) Citation

Bona, Andrej, and M. Slawinski. Fermat's Principle for Seismic Rays in Elastic Media. Elsevier, 2003.

MLA (9th ed.) Citation

Bona, Andrej, and M. Slawinski. Fermat's Principle for Seismic Rays in Elastic Media. Elsevier, 2003.

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