Andrea De Simone; Alan H. Guth; Andrei Linde; Mahdiyar Noorbala; Michael P. Salem; Alexander Vilenkin (14 September 2010). “Boltzmann brains and the scale-factor cutoff measure of the multiverse”. Physical Review D82 (6): 063520. arXiv:0808.3778. Bibcode: 2010PhRvD..82f3520D. doi:10.1103/PhysRevD.82.063520.
Andrea De Simone; Alan H. Guth; Andrei Linde; Mahdiyar Noorbala; Michael P. Salem; Alexander Vilenkin (14 September 2010). “Boltzmann brains and the scale-factor cutoff measure of the multiverse”. Physical Review D82 (6): 063520. arXiv:0808.3778. Bibcode: 2010PhRvD..82f3520D. doi:10.1103/PhysRevD.82.063520.
Andrea De Simone; Alan H. Guth; Andrei Linde; Mahdiyar Noorbala; Michael P. Salem; Alexander Vilenkin (14 September 2010). “Boltzmann brains and the scale-factor cutoff measure of the multiverse”. Physical Review D82 (6): 063520. arXiv:0808.3778. Bibcode: 2010PhRvD..82f3520D. doi:10.1103/PhysRevD.82.063520.