1. XAFS Tutorials

       https://xafs.xrayabsorption.org/tutorials.html, 

       https://xrayabsorption.org/tutorials/

  2. Experimental References

        - X-ray absorption energy : http://www.csrri.iit.edu/periodic-table.html

        - X-ray absorption coefficient : http://www.csrri.iit.edu/mucal.html

        - Filter transmission : http://henke.lbl.gov/optical_constants/filter2.html

  3. XAFS Simulation

     - Web Atoms: https://millenia.cars.aps.anl.gov/webatoms/

     - Feff Project : https://feff.phys.washington.edu/

     - Crystallographic database:

          - The Materials Project: https://next-gen.materialsproject.org/

         - ICSD Korea: http://icsd.kisti.re.kr/icsd/first.jsp

         - ICSD Germany : http://icsd.fiz-karlsruhe.de/icsd/

         - CCDC UK: http://www.ccdc.cam.ac.uk/

  4. Pohang Synchrotron Light Source (PLS)

     - http://pal.postech.ac.kr/