Malatesta, M., S. Grecchi, E. Chiesa, B. Cisterna, M. Costanzo, and C. Zancanaro. “Internalized Chitosan Nanoparticles Persist for Long Time in Cultured Cells”. European Journal of Histochemistry, vol. 59, no. 1, Feb. 2015, doi:10.4081/ejh.2015.2492.