Pasterski, Sabrina; Strominger, Andrew; Zhiboedov, Alexander (2015). "Asymptotic Symmetries and Electromagnetic Memory". Journal of High Energy Physics. 2017 (9). arXiv:1505.00716. doi:10.1007/JHEP09(2017)154. S2CID59500056.
Pasterski, Sabrina; Strominger, Andrew; Zhiboedov, Alexander (2015). "Asymptotic Symmetries and Electromagnetic Memory". Journal of High Energy Physics. 2017 (9). arXiv:1505.00716. doi:10.1007/JHEP09(2017)154. S2CID59500056.
Pasterski, Sabrina; Strominger, Andrew; Zhiboedov, Alexander (2015). "Asymptotic Symmetries and Electromagnetic Memory". Journal of High Energy Physics. 2017 (9). arXiv:1505.00716. doi:10.1007/JHEP09(2017)154. S2CID59500056.