Watrous، John؛ Aaronson، Scott (2009). "Closed timelike curves make quantum and classical computing equivalent". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. ج. 465 ع. 2102: 631. arXiv:0808.2669. Bibcode:2009RSPSA.465..631A. DOI:10.1098/rspa.2008.0350.
Watrous، John؛ Aaronson، Scott (2009). "Closed timelike curves make quantum and classical computing equivalent". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. ج. 465 ع. 2102: 631. arXiv:0808.2669. Bibcode:2009RSPSA.465..631A. DOI:10.1098/rspa.2008.0350.
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Watrous، John؛ Aaronson، Scott (2009). "Closed timelike curves make quantum and classical computing equivalent". Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences. ج. 465 ع. 2102: 631. arXiv:0808.2669. Bibcode:2009RSPSA.465..631A. DOI:10.1098/rspa.2008.0350.