@BOOK{ Book!D - 72134441,
AUTHOR = "Postnikov, M. M.)Mikhail Mikhailovich(",
TITLE = "The variational theory of geodesics",
LIBRARY= "كتابخانه مركزی دانشگاه صنعتی شریف",
SUBJECT = "، Calculus of variations,، Geometry, Differential",
URL = "/book/72134441/The-variational-theory-of-geodesics/"}