1. A.G. Sveshnikov and A.N. Tikhonov, The Theory of Functions of a Complex Variable (MIR Publishers, 1973)
2. P.M. Morse, H. Feshbach, Methods of Theoretical Physics (McGraw-Hill Book C, Part I, 1953)
3. G.B. Arfken and H.J. Weber, Mathematical Methods for Physicists, 6th Edn. (Elsevier Academic Press, 2005)
4. C. Bernardini, O. Ragnisco, P. Santini, Metodi Matematici della Fisica (La Nuova Italia Scientifica, Roma, 1993)
5. A. Zangwill, Modern Electrodynamics (Cambridge University Press, Cambridge, 2013)