%0 Journal Article %A D. V. Znoiko %T Free products of networks and free symmetrizers of graphs %J Sbornik. Mathematics %D 1975 %P 463-480 %V 27 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1975_27_4_a1/ %G en %F SM_1975_27_4_a1