Bissey, F., Cudell, J.-R., Cugnon, J., Jaminon, M., Lansberg, J.-P., & Stassart, P. (07 November 2002). A model for the pion structure function.
Physics Letters B, 547 (3-4), 210-218. doi:10.1016/S0370-2693(02)02775-2
https://hdl.handle.net/2268/3721