RUIDO BARKHAUSSEN
http://www.stresstech.fi/bna_teoria.htm
http://arxiv.org/PS_cache/cond-mat/pdf/9704/9704059.pdf
http://www.physics.queensu.ca/~amg/papers/barkhausen_papers.html
http://www.physics.queensu.ca/~amg/barkhausen.html
http://omnis.if.ufrj.br/~sldq/PRE03884.pdf
http://omnis.if.ufrj.br/~sldq/PRE66127.pdf
http://www.ndt.net/article/wcndt00/papers/idn778/idn778.htm
http://www.ndt.net/article/wcndt00/papers/idn337/idn337.htm
http://www.mse.vt.edu/faculty/hendricks/publications/ICRS5_BNA_Paper.pdf
http://polymer.bu.edu/hes/articles/sbms96.pdf
http://www.ien.it/~durin/jap_barkh.pdf