Claude Duhr:
https://arxiv.org/abs/1411.7538
https://arxiv.org/abs/1412.2296
https://www.annualreviews.org/doi/10.1146/annurev-nucl-101918-023551
Marcus Spradlin:
1308.1697
1708.03872
Stephan Stieberger:
1. Lectures on the Infrared Structure of Gravity and Gauge Theory
Andrew Strominger (Harvard U.). Mar 15, 2017. 158 pp.
e-Print: arXiv:1703.05448 [hep-th] | PDF
2. Implications of Superrotations
Sabrina Pasterski (Harvard U., Phys. Dept.). May 24, 2019. 35 pp.
Published in Phys.Rept. 829 (2019) 1-35