by Scandale, Walter, Still, Dean A, Carnera, Alberto, Della Mea, Gianantonio, De Salvador, Davide, Milan, Riccardo, Vomiero, Alberto, Baricordi, Stefano, Dalpiaz, Pietro, Fiorini, Massimiliano, Guidi, Vincenzo, Martinelli, Giuliano, Mazzolari, Andrea, Milan, Emiliano, Ambrosi, Giovanni, Azzarello, Philipp, Battiston, Roberto, Bertucci, Bruna, Burger, William J, Ionica, Maria, Zuccon, Paolo, Cavoto, Gianluca, Santacesaria, Roberta, Valente, Paolo, Vallazza, Erik, Afonin, Alexander G, Baranov, Vladimir T, Chesnokov, Yury A, Kotov, Vladilen I, Maisheev, Vladimir A, Yaznin, Igor A, Afansiev, Sergey V, Kovalenko, Alexander D, Taratin, Alexander M, Denisov, Alexander S, Gavrikov, Yury A, Ivanov, Yuri M, Ivochkin, Vladimir G, Kosyanenko, Sergey V, Petrunin, Anatoli A, Skorobogatov, Vyacheslav V, Suvorov, Vsevolod M, Bolognini, Davide, Foggetta, Luca, Hasan, Said, Prest, Michela
Published in Physical review letters (13.04.2007)