@BOOK{ Book!D - 77772613,
AUTHOR = "Krupkova, Olga.",
TITLE = "The geometry of ordinary variational equations",
LIBRARY= "کتابخانه مرکزی و مرکز اطلاع رسانی دانشگاه فردوسی مشهد",
SUBJECT = "، Differential equations,، Calculus of variations,، Geometry, Differential",
URL = "/book/77772613/The-geometry-of-ordinary-variational-equations/"}