A. Eskreys

Observation of the reaction γγ → ppπ+π−

F. J. Kirschfink, H. Kolanoski, L. Köpke, 1984 .

Measurement of the radiative width of the η′(958) in two-photon interactions

F. J. Kirschfink, H. Kolanoski, L. Köpke, 1984 .