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. 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].
2. Sang-Kil Son and Robin Santra, “Inner-shell multiphoton multiple ionization dynamics of xenon atoms by x-ray free-electron laser pulses” in DPG Spring Meeting of the Section AMOP (German Physical Society, Hanover, Germany, March 18-22, 2013) [oral presentation].
3. Sang-Kil Son, Koudai Toyota, Robin Santra, Benedikt Rudek, Artem Rudenko, and Daniel Rolles, “Relativistic and resonant effects on x-ray multiphoton multiple ionization of heavy atoms” in 83rd Annual Meeting of the DPG and DPG Spring Meeting of the Section AMOP (German Physical Society, Rostock, Germany, March 11-15, 2019) [oral presentation].
4. Sang-Kil Son, “Breakdown of frustrated absorption in x-ray sequential multiphoton ionization” in CFEL-DESY Theory Seminar (CFEL, DESY, Hamburg, Germany, April 1, 2020) [oral presentation].
5. Sang-Kil Son, “Theory of X-ray–matter interactions” in Ultrafast X-ray Summer School (PULSE, Stanford, California, United States, June 15-22, 2020) [lecture].