Cross-Section Measurements for the Exclusive Reaction e+ e- –> 4 pi+- in the Energy Range 1.2-GeV to 3.0-GeV - Bernardini, M.; Bollini, D.; Brunini, P. L.; Fiorentino, E.; Massam, T.; Monari, L.; Palmonari, F.; Rimondi, F.; Zichichi, A. (Phys. Lett. B, 1974)