Belogianni, A.(1997). Confirmation of a soft photon signal in excess of Q.E.D. expectations in π−p interactions at 280 GeV/c. Physics Letters B, 408(1-4), 487-492. doi:10.1016/s0370-2693(97)00762-4

Belogianni, A. "Confirmation of a Soft Photon Signal in Excess of Q.E.D. Expectations in π−p Interactions At 280 GeV/c". Physics Letters B, 408.1-4 ( 1997 ): 487-492.