Postnikov, M. M. (1967). The variational theory of geodesics. W. B. Saunders.
Citación estilo ChicagoPostnikov, M. M. The Variational Theory of Geodesics. Filadelfia: W. B. Saunders, 1967.
Cita MLAPostnikov, M. M. The Variational Theory of Geodesics. W. B. Saunders, 1967.
Warning: These citations may not always be 100% accurate.