Hsu, Sze-Bi Ordinary differential equations with applications - 2nd ed. - New Jersey World Scientific 2020 - xiii, 297p. - Series on Applied Mathematics . - Shi, Zhong-ci . ISBN: 9780000988942 Subjects--Topical Terms: Linear systemsTwo-dimensional systemsPerturbation methods Dewey Class. No.: 515.352 H85972o2