Thieberger R Spiegel EA and Smith LA  ‘ The dimensions of cosmic fractals” https:leonardsmithuswpc

Thieberger, R., Spiegel, E.A. and Smith, L.A. 1990 ‘The dimensions of cosmic fractals‘, in Krasner, S. (ed.) The Ubiquity of Chaos, 197-217. American Association for the Advancement of Science, Washington DC.