@BOOK{ Book!D - 89944420,
AUTHOR = " by Arik Melikyan.",
TITLE = "Generalized Characteristics of First Order PDEs",
LIBRARY= "کتابخانه مطالعات اسلامی به زبان‌های اروپایی",
SUBJECT = "Differential equations, Partial.,Mathematics.",
URL = "/book/89944420/Generalized-Characteristics-of-First-Order-PDEs/"}