FICKER, Tomaš, Vratislav KAPIČKA and Pavel SLAVÍČEK. Fractal character of microdischarge phenomena. In XVI Symposium on Physics of Switching Arc. Brno: Faculty of Electrical Engineering and Communication, BUT, 2005, p. 69-72. ISBN 80-214-2931-3.
KOMÁREK, Ondřej. Spatial Autocorrelation and Fractal Dimension of Alga Species Assemblage in a Gravel Stream of Central Europe. Internat. Rev. Hydrobiol. Weinheim: WILEY-VCH Verlag GmbH & Co., 2003, 88/2003, 3-4, p. 385-396, 11 pp. ISSN 1434-2944.