LIGO Scientific Collaboration & Virgo Collaboration, Abbott, B. P., Abbott, R., Acernese, F., Adhikari, R., Ajith, P., … Rolland, L. (2009). An upper limit on the stochastic gravitational-wave background of cosmological origin. Nature, 460(7258), 990–994. https://doi.org/10.1038/nature08278

LIGO Scientific Collaboration & Virgo Collaboration, B. P. Abbott, R. Abbott, F. Acernese, R. Adhikari, P. Ajith, B. Allen, et al. “An upper limit on the stochastic gravitational-wave background of cosmological origin.” Nature 460, no. 7258 (August 2009): 990–94. https://doi.org/10.1038/nature08278.

LIGO Scientific Collaboration & Virgo Collaboration, Abbott BP, Abbott R, Acernese F, Adhikari R, Ajith P, et al. An upper limit on the stochastic gravitational-wave background of cosmological origin. Nature. 2009 Aug;460(7258):990–4.

LIGO Scientific Collaboration & Virgo Collaboration, et al. “An upper limit on the stochastic gravitational-wave background of cosmological origin.” Nature, vol. 460, no. 7258, Aug. 2009, pp. 990–94. Epmc, doi:10.1038/nature08278.

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