%0 Journal Article %A A. V. Efimov %A V. P. Potapov %T $J$-expanding mtrix functions and their role in the analytical theory of electrical circuits %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 1973 %P 69-140 %V 28 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/RM_1973_28_1_a1/ %G en %F RM_1973_28_1_a1