@BOOK{ Book!D - 91704648, AUTHOR = "Makarets, M. V.", TITLE = "Ordinary differential equations and calculus of variations : book of problems", LIBRARY= "کتابخانه مرکزی دانشگاه صنعتی امیرکبیر", SUBJECT = " Differential equations - Problems, exercises, etc , Calculus of variations - Problems, exercises, etc ", URL = "/book/91704648/Ordinary-differential-equations-and-calculus-of-va/"}