Braid theory and Zipf-Mandelbrot relation used in microparticle dynamics K. de Lange Kristiansen, G. Helgesen and A. T. Skjeltorp Eur. Phys. J. B, 51 3 (2006) 363-371 Published online: 21 June 2006 DOI: 10.1140/epjb/e2006-00241-7