G. Aad, B. Abbott, D. C. Abbott, A. A. Abud, B. Ali, K. Augsten, B. Bergmann, M. Havránek, Z. Hubáček, M. Myška et al.: Observation of electroweak production of two jets and a Z-boson pair. Nature Physics (2023). doi:10.1038/s41567-022-01757-y