Edrissi, M., and A. R. Keshavarz. “Synthesis of Cobalt Chromite Nanoparticles by Thermolysis of Mixed Cr3+ and Co2+ Chelates of 2-Mercaptopyridin N-Oxide”. Nano-Micro Letters, vol. 4, no. 2, June 2012, pp. 83-89, doi:10.1007/BF03353697.