1. Weinberg, L.: Network analysis and synthesis, (McGraw-Hill, New York 1962)
2. Guillemin, E.A.: Synthesis of passive networks, (John Wiley & Sons, New York 1957)
3. Jones, W.B., and Thron, W.J.: Continued fractions: analytic theory and applications, (Addison Wesley, Reading, Mass 1980),(Advanced book program)