Bloznelis, Mindaugas, and Irmantas Radavičius. “Simulation Study of a Tree Similarity Measure Based on Small Subtree Counts”. Lietuvos Matematikos Rinkinys, vol. 50, no. proc. LMS, Dec. 2009, pp. 362–367, https://doi.org/10.15388/LMR.2009.64.