APA Citation

Perlick, V. Fermats principle, Morse theory and applications to the gravitational lens effect.

Trích dẫn kiểu Chicago

Perlick, Volker. Fermats Principle, Morse Theory and Applications to the Gravitational Lens Effect.

MLA Citation

Perlick, Volker. Fermats Principle, Morse Theory and Applications to the Gravitational Lens Effect.

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