Topological Properties of the Contact Network of Granular Materials. - Roberto Arévalo; Iker Zuriguel; Diego Maza (Int. J. Bifurc. Chaos, 2009)

Third Order Loops of Contacts in a Granular Force Network. - Roberto Arévalo; Iker Zuriguel; Sergio Ardanza-Trevijano; Diego Maza (Int. J. Bifurc. Chaos, 2010)