Giannoni, F. A timelike extension of fermat's principle in general relativity. Comparisons with the lightlike case.
Chicago Style aipamenaGiannoni, Fabio. A Timelike Extension of Fermat's Principle in General Relativity. Comparisons With the Lightlike Case.
MLA aipamenaGiannoni, Fabio. A Timelike Extension of Fermat's Principle in General Relativity. Comparisons With the Lightlike Case.
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