Brunsell PR, Yadikin D, Gregoratto D, Paccagnella R, Bolzonella T, Cavinato M, Cecconello M, Drake JR, Luchetta A, Manduchi G, Marchiori G, Marrelli L, Martin P, Masiello A, Milani F, Ortolani S, Spizzo G, Zanca P.
Phys Rev Lett. 2004 Nov 26;93(22):225001. Epub 2004 Nov 22.