Casolino M, Bidoli V, Morselli A, Narici L, De Pascale M P, Picozza P, Reali E, Sparvoli R, Mazzenga G, Ricci M, Spillantini P, Boezio M, Bonvicini V, Vacchi A, Zampa N, Castellini G, Sannita W G, Carlson P, Galper A, Korotkov M, Popov A, Vavilov N, Avdeev S, Fuglesang C
Department of Physics, University of Tor Vergata, 00133 Rome, Italy.
Nature. 2003 Apr 17;422(6933):680. doi: 10.1038/422680a.