एपीए उद्धरण

Giannoni, F. A timelike extension of fermat's principle in general relativity. Comparisons with the lightlike case.

शिकागो स्टाइल उद्धरण

Giannoni, Fabio. A Timelike Extension of Fermat's Principle in General Relativity. Comparisons With the Lightlike Case.

एमएलए उद्धरण

Giannoni, Fabio. A Timelike Extension of Fermat's Principle in General Relativity. Comparisons With the Lightlike Case.