Introduction to differential equations with dynamical systems By Stephen L. Campbell, Richard Haberman 2008 | 444 Pages | ISBN: 0691124744 | PDF | 4 MB
Applied Partial Differential Equations with Fourier Series and Boundary Value Problems, 5th edition by Richard Haberman English | 2012 | ISBN-10: 0321797051, 0134995430 | 784 pages | PDF | 14 MB