Hopefully this will be the go-to article for everyone who wants to know more about photoelastic granular materials research.
Aghil Abed Zadeh, Jonathan Barés, Theodore A. Brzinski, Karen E. Daniels, Joshua Dijksman, Nicolas Docquier, Henry O. Everitt, Jonathan E. Kollmer, Olivier Lantsoght, Dong Wang, Marcel Workamp, Yiqiu Zhao, et al. — Granular Matter 21 (2019)
MultiPhase Matters 