Katz, Nets Hawk; Tardos, Gábor (2004). "A new entropy inequality for the Erdős distance problem". In Pach, János (ed.). Towards a theory of geometric graphs. Contemporary Mathematics. Vol. 342. Providence, RI: American Mathematical Society. pp. 119–126. doi:10.1090/conm/342/06136. ISBN978-0-8218-3484-8. MR2065258.
Katz, Nets Hawk; Tardos, Gábor (2004). "A new entropy inequality for the Erdős distance problem". In Pach, János (ed.). Towards a theory of geometric graphs. Contemporary Mathematics. Vol. 342. Providence, RI: American Mathematical Society. pp. 119–126. doi:10.1090/conm/342/06136. ISBN978-0-8218-3484-8. MR2065258.