Add synchrotron state-of-the-art

refs.bib

@@ -314,4 +314,33 @@ ISSN={0003-6951},}
   publisher={National Acad Sciences}
 }
 
+@article{yeager2012high,
+  title={High-speed synchrotron X-ray phase contrast imaging for analysis of low-Z composite microstructure},
+  author={Yeager, JD and Luo, SN and Jensen, BJ and Fezzaa, K and Montgomery, DS and Hooks, DE},
+  journal={Composites Part A: Applied Science and Manufacturing},
+  volume={43},
+  number={6},
+  pages={885--892},
+  year={2012},
+  publisher={Elsevier}
+}
+
+@article{xiao2014fast,
+  title={Fast synchrotron X-ray tomography study of the packing structures of rods with different aspect ratios},
+  author={Xiao-Dan, Zhang and Cheng-Jie, Xia and Xiang-Hui, Xiao and Yu-Jie, Wang},
+  journal={Chinese Physics B},
+  volume={23},
+  number={4},
+  pages={044501},
+  year={2014},
+  publisher={IOP Publishing}
+}
 
+@inproceedings{xiao2012x,
+  title={X-ray fast tomography and its applications in dynamical phenomena studies in geosciences at Advanced Photon Source},
+  author={Xiao, Xianghui and Fusseis, Florian and De Carlo, Francesco},
+  booktitle={Proc. SPIE},
+  volume={8506},
+  pages={85060K},
+  year={2012}
+}