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2. G.B. Arfken, H.J. Weber, F.E. Harris, Mathematical Methods for Physicists (Elsevier, 2013)
3. E. Kreyszig, Advanced Engineering Mathematics, 10th edn. (Wiley, 2011)
4. O’Neil, Engineering Mathematics (Thomson, 2003)
5. R.E. Collin, Field Theory of Guided Waves (IEEE Press, 1991)