Distance distribution between cluster Gr34513 (A2020) and other groups and clusters of different richness (left panels) and the distribution of groups with at least four galaxies in Cartesian coordinates (right panels). Notations and details are the same as in Fig. 6. The maxima are located at 122 and 239 h^-1 Mpc (upper left panel, N_gal ≥ 50), and 128 and 240 h^-1 Mpc (lower left panel, N_gal ≥ 30).