1. Sang-Kil Son, Linda Young, and Robin Santra, “Impact of hollow-atom formation on coherent x-ray scattering at high intensity,” Phys. Rev. A 83, 033402 (2011).
2. Sang-Kil Son, Henry N. Chapman, and Robin Santra, “Multiwavelength anomalous diffraction at high x-ray intensity,” Phys. Rev. Lett. 107, 218102 (2011).
3. Sang-Kil Son, Henry N. Chapman, and Robin Santra, “Determination of multiwavelength anomalous diffraction coefficients at high x-ray intensity,” J. Phys. B: At. Mol. Opt. Phys. 46, 164015 (2013) [special issue on frontiers of free-electron laser science].
4. Malik Muhammad Abdullah, Zoltan Jurek, Sang-Kil Son, and Robin Santra, “Calculation of x-ray scattering patterns from nanocrystals at high x-ray intensity,” Struct. Dyn. 3, 054101 (2016).
5. Sang-Kil Son, Otfried Geffert, and Robin Santra, “Compton spectra of atoms at high x-ray intensity,” J. Phys. B: At. Mol. Opt. Phys. 50, 064003 (2017) [special issue: emerging leaders].
6. Malik Muhammad Abdullah, Sang-Kil Son, Zoltan Jurek, and Robin Santra, “Towards the theoretical limitations of x-ray nanocrystallography at high intensity: the validity of the effective-form-factor description,” IUCrJ 5, 699–705 (2018).