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Perlman، Eric S.؛ Rappaport، Saul A.؛ Christensen، Wayne A.؛ Jack Ng، Y.؛ DeVore، John؛ Pooley، David (2014). "New Constraints on Quantum Gravity from X-ray and Gamma-Ray Observations". The Astrophysical Journal. ج. 805: 10. arXiv:1411.7262. Bibcode:2015ApJ...805...10P. DOI:10.1088/0004-637X/805/1/10.
Perlman، Eric S.؛ Rappaport، Saul A.؛ Christensen، Wayne A.؛ Jack Ng، Y.؛ DeVore، John؛ Pooley، David (2014). "New Constraints on Quantum Gravity from X-ray and Gamma-Ray Observations". The Astrophysical Journal. ج. 805: 10. arXiv:1411.7262. Bibcode:2015ApJ...805...10P. DOI:10.1088/0004-637X/805/1/10.
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