Leshchenko, Yu.Yu., and L.V. Zoria. “On Diameters Estimations of the Commuting Graphs of Sylow $p$-Subgroups of the Symmetric Groups”. Carpathian Mathematical Publications, vol. 5, no. 1, June 2013, pp. 70-78, doi:10.15330/cmp.5.1.70-78.