Silva J. M., Georgi N., Costa R. R., Praveen S., Reis R. L., van Blitterswijk C. A., Karperien M., and Mano J. F.,  "Nanostructured 3D Constructs Based on Chitosan and Chondroitin Sulphate Multilayers for Cartilage Tissue Engineering",  PLOS ONE, vol. 8, issue 2, pp. 1-11, doi:10.1371/journal.pone.0055451, 2013.