Conrad, Bruce P. Differential equations with boundary value problems : a systems approach / Bruce P. Conrad. - Upper Saddle River, NJ Prentice Hall, 2003. - xvii, 558p. :ill.; Hbk. ISBN: 0130934194 Subjects--Topical Terms: Differential equations.Boundary value problems. LC Class. No.: QA372.C6 2003 Dewey Class. No.: 515/.35