Measurement of the $Z Z \gamma$ and $Z \gamma \gamma$ couplings in $p\bar{p}$ collisions at $\sqrt{s} = 1.8$ TeV
Phys.Rev.Lett. 75 (1995) 1028
The collaboration

Abstract (data abstract)
FNAL-COLLIDER. Measurement of the Z Z GAMMA and Z GAMMA GAMMA couplings in PBAR P collisions at sqrt(s) = 1.8 TeV.