by Alves, GA, Amato, S, Anjos, JC, Appel, JA, Astorga, J, Bernard, T, Bracker, SB, Cremaldi, LM, Darling, CL, Dixon, RL, Errede, D, Gay, C, Green, DR, Jedicke, R, Karchin, PE, Kwan, S, Lueking, LJ, de Mello Neto JR, Metheny, J, Milburn, RH, de Miranda JM, da Motta Filho H, Napier, A, Passmore, D, Rafatian, A, dos Reis AC, Ross, WR, Santoro, AF, Sheaff, M, Souza, MH, Spalding, WJ, Stoughton, C, Streetman, ME, Summers, DJ, Takach, SF, Wallace, A, Wu, Z
Published in Physical review letters (07.02.1994)