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2. Milne-Thomson, L. M. 1950 Jacobian Elliptic Function Tubbs. Dover. (Republished by Maomillan 1970.)
3. Cayley, A. 1895 An Elementary Treatise on Elliptic Functions ,2nd edn. Bell & Sons (Dover reprint 1961).
4. Kober, H. 1957 Dictionary of Conformal Representations. Dover.
5. Cockcroft, J. D. 1927 J. Inst. Elec. Engrs,66,385.