Stoltenberg, M, S Juhl, and G Danscher. “Bismuth Ions Are Metabolized into Autometallographic Traceable Bismuth-Sulphur Quantum Dots”. European Journal of Histochemistry 51, no. 1 (June 30, 2009): 53-58. Accessed November 24, 2020. https://www.ejh.it/index.php/ejh/article/view/1012.