Leading proton production in deep inelastic scattering at HERA by Chekanov, S, Derrick, M, Magill, S, Musgrave, B, Nicholass, D, Repond, J, Yoshida, R, Mattingly, M, Antonioli, P, Bari, G, Bellagamba, L, Boscherini, D, Bruni, A, Bruni, G, Cindolo, G, Corradi, M, Giusti, P, Iacobucci, G, Margotti, A, Massam, T, Nania, R, Polini, A, Antonelli, S, Basile, M, Bindi, M