Experimental demonstration of sub-shot-noise intensity correlations in an intense twin beamM. Bondani, A. Allevi, G. Zambra, A. Andreoni, J. Peřina, J. Křepelka and J. PeřinaEur. Phys. J. Special Topics, 160 (2008) 33-41DOI: https://doi.org/10.1140/epjst/e2008-00707-x