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. 1997 Feb 1;109(2):129–140. doi: 10.1085/jgp.109.2.129

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Path-to-bee-line ratio for limited asymmetry. x-axis: limit to symmetry index (ξ^low). y-axis: path-to-bee-line ratio as defined in Eq. 7. For each tree the paths to all terminal segments are examined; squares indicate mean values, bars show minima/maxima. Note that this figure also displays the results for additional CCO-trees with ξ^low = 0.05, 0.08, 0.12, 0.14, and 0.2.