Generalized Nonuniform Transmission Lines

[2]  A.T. Starr.  The Nonuniform Transmission Line , 1932, Proceedings of the Institute of Radio Engineers.

[3]  S. D. Roy.  Some Exactly Solvable Nonuniform RC Lines , 1965 .

[4]  W. Kaufman,et al.  Tapered Distributed Filters , 1962 .