1. S.D. Chowdhury, A. Gadde, T. Gopalka, I. Halder, L. Janagal and S. Minwalla, Classifying and constraining local four photon and four graviton S-matrices, JHEP02 (2020) 114 [arXiv:1910.14392] [INSPIRE].
2. P. Kravchuk and D. Simmons-Duffin, Counting Conformal Correlators, JHEP02 (2018) 096 [arXiv:1612.08987] [INSPIRE].
3. N. Arkani-Hamed, T.-C. Huang and Y.-t. Huang, Scattering Amplitudes For All Masses and Spins, arXiv:1709.04891 [INSPIRE].
4. J. Bonifacio and K. Hinterbichler, Bounds on Amplitudes in Effective Theories with Massive Spinning Particles, Phys. Rev.D 98 (2018) 045003 [arXiv:1804.08686] [INSPIRE].
5. R. Jha, C. Krishnan and K.V. Pavan Kumar, Massive Scattering Amplitudes in Six Dimensions, JHEP03 (2019) 198 [arXiv:1810.11803] [INSPIRE].