1. Gilles Doumy, C. Roedig, Sang-Kil Son, C. I. Blaga, A. D. DiChiara, Robin Santra, N. Berrah, C. Bostedt, J. D. Bozek, P. H. Bucksbaum, J. P. Cryan, L. Fang, S. Ghimire, J. M. Glownia, M. Hoener, E. P. Kanter, B. Krässig, M. Kuebel, M. Messerschmidt, G. G. Paulus, D. A. Reis, N. Rohringer, L. Young, P. Agostini, and L. F. DiMauro, “Nonlinear atomic response to intense ultrashort x rays,” Phys. Rev. Lett. 106, 083002 (2011).
  2. Gilles Doumy, C. Roedig, Sang-Kil Son, C. I. Blaga, A. D. DiChiara, Robin Santra, N. Berrah, C. Bostedt, J. D. Bozek, P. H. Bucksbaum, J. P. Cryan, L. Fang, S. Ghimire, J. M. Glownia, M. Hoener, E. P. Kanter, B. Krässig, M. Messerschmidt, D. A. Reis, N. Rohringer, L. Young, P. Agostini, and L. F. DiMauro, “Nonlinear atomic response to ultraintense and ultrashort x-ray pulses” in 75th Annual Meeting of the DPG and DPG Spring Meeting of the Section AMOP (German Physical Society, Dresden, Germany, March 13-18, 2011) [oral presentation].
  3. Christoph Roedig, Gilles Doumy, Sang-Kil Son, C. I. Blaga, Anthony DiChiara, R. Santra, N. Berrah, C. Bosteadt, J. D. Bozek, Philip H. Bucksbaum, J. P. Cryan, L. Fang, S. Ghimire, J. M. Glownia, M. Hoener, E. P. Kanter, B. Krassig, M. Kuebel, M. Messerschmidt, G. Paulus, David A. Reis, Nina Rohringer, L. Young, Pierre Agostini, and Lou DiMauro, “Multi Photon Physics at the LCLS” in Frontiers in Optics / Laser Science XXVII (San Jose, California, 16-20 October, 2011).
  4. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in 1st CFEL Symposium 2011 (CFEL, Sylt, Germany, March 18-20, 2011) [poster].
  5. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in The 17th International Conference on Atomic Processes in Plasmas (Queen's University, Belfast, United Kingdom, July 19-22, 2011) [poster].
  6. Sang-Kil Son, “Electronic response to X-ray free-electron laser pulses” in The 3rd CQSE International Workshop on Atomic, Molecular, and Ultrafast Science and Technology (National Taiwan University, Taipei, Taiwan, January 7-8, 2012) [invited talk].
  7. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in The 3rd CQSE International Workshop on Atomic, Molecular, and Ultrafast Science and Technology (National Taiwan University, Taipei, Taiwan, January 7-8, 2012) [poster].
  8. Sang-Kil Son and Robin Santra, “XATOM: an integrated toolkit for X-ray and atomic physics” in Photoions, Photoionization and Photodetachment (Gordon Research Conference, Galveston, Texas, US, February 12-17, 2012) [poster].
  9. Arina Sytcheva, Stefan Pabst, Sang-Kil Son, and Robin Santra, “Enhanced nonlinear response of Ne8+ to intense ultrafast x rays,” Phys. Rev. A 85, 023414 (2012).
  10. Laura Budewig, Sang-Kil Son, and Robin Santra, “Theoretical investigation of orbital alignment of x-ray-ionized atoms in exotic electronic configurations,” Phys. Rev. A 105, 033111 (2022).
  11. Niels Breckwoldt, Sang-Kil Son, Tommaso Mazza, Aljoscha R"orig, Rebecca Boll, Michael Meyer, Aaron C. LaForge, Debadarshini Mishra, Nora Berrah, and Robin Santra, “Machine-learning calibration of intense x-ray free-electron-laser pulses using Bayesian optimization,” Phys. Rev. Res. 5, 023114 (2023).
  12. Laura Budewig, Sang-Kil Son, and Robin Santra, “State-resolved ionization dynamics of neon atom induced by x-ray free-electron-laser pulses,” Phys. Rev. A 107, 013102 (2023).
  13. Sang-Kil Son, “New opportunities in x-ray spectroscopy at high intensity” in XFEL Special Seminar (PAL XFEL, POSTECH, Pohang, Korea, July 20, 2023) [invited talk].