Sultan S, Mathew AP. 3D printed scaffolds with gradient porosity based on a cellulose nanocrystal hydrogel. Nanoscale. 2018;10(9):4421–31. Found at: http://pubs.rsc.org/en/content/articlehtml/2018/nr/c7nr08966j

Sahar Sultan, Gilberto Siqueira, Tanja Zimmermann, Aji P. Mathew. 3D printing of nano-cellulosic biomaterials for medical applications. Current Opinion in Biomedical Engineering. 2017;2: 29-34. Found at: https://www.sciencedirect.com/science/article/pii/S2468451117300132