References
[1] Grossman S.T., (1996) Multivariable Calculus, Linear Algebra and Differential Equations, 3rd. HBL Publishers, ISBN: 0 155 64751 2
[2] Stewart J., (2009) Calculus \(6^{\text {th}}\) ed. Brooks/Cole Cengage Learning, ISBN: 0 495 38362 8
[3] Wylie, C.R. and Barrett, L.C. (1995). Advanced Engineering Mathematics. McGraw-Hill. ISBN 0 070 722064
[4] Kreyszig, E. (2011). Advanced Engineering Mathematics, 10th ed. John Wiley & Sons. ISBN: 0 470 45836 5