[1] Newcomb R. W.: The foundations of network theory. Techn. report No 2250 - 4, Stanford University - California, March 1963.

[2] Zemanian A. H.: An n-port realizability theory based on the theory of distributions. Proc. of IEEE, Trans, on CT - 10 (1963), pp. 265-274.

[3] Wohlers M. R., Beltrami E. J.: Distribution theory as the basis of generalized passive-network analysis. Proc. of IEEE, Trans, on CT - 12 (1965), pp. 164-170.

[4] Doležal V.: Dynamics of linear systems. Prague 1964. MR 0220530

[5] Гельфанд И. M., Шилов Г. E.: Обобщенные функции и действия над ними. Москва 1959. Zbl 1047.90504