@article{article, title  = {{Upper limits on the isotropic gravitational-wave background from Advanced LIGO and Advanced Virgo’s third observing run}},

 publisher = {{American Physical Society (APS)}},

 url = {{https://doi.org/10.1103/physrevd.104.022004 }},

 year = {{2021}},

 month = {{7}},

 author = {{Abbott R and Abbott TD and Abraham S and Acernese F and Ackley K and Adams A and Adams C and Adhikari RX and Adya VB and Affeldt C and Agarwal D et al}},

 doi = {{10.1103/physrevd.104.022004}},

 volume = {{104}},

 journal = {{Physical Review D}},

 issue = {{2}},

 note = {{Accessed on 2025/11/23}}}