Pair-wise distance distribution functions, Pc(r), for the cross-section of the rod-like fibers of multi-component networks: chitosan, cyan; alginate, black; chitosan + alginate, orange; chitosan + alginate + CaCl2, violet; chitosan + alginate + chondroitin, light green. Functions with two maxima are characteristic for the dumbbell shape of the cross-section. Value of r in Å where Pc(r) goes to zero defines the maximum dimension of the cross-section which for all fibers is around 375 Å.