_____________________________________________________________________________________
1. "Differential Equations. Theory, Technique and Practice", Simmons, G.F., and Krantz, S.G. . McGraw-Hill Companies, Inc. 2007.
2. "Elementary Applied Partial Differential Equations", Haberman, R. 3rd. ed. Prentice-Hall. 1998.
3. "Differential Equations with Applications and Historical Notes", Simmons, G.F. 3rd. ed. CRC Press Textbooks Mathematics, 2017.
4. "A First Course in Differential Equations with Modelling Applications", Zill, D. 9th ed. Brooks Cole 2000.
5. "Elementary Differential Equations with Boundary Value Problems", Edwards, C.H. and Penney, D.E., Pearson Education, 2014.