Kar, P., T. K. Maji, R. Nandi, P. Lemmens, and S. K. Pal. “In-Situ Hydrothermal Synthesis of Bi–Bi2O2CO3 Heterojunction Photocatalyst With Enhanced Visible Light Photocatalytic Activity”. Nano-Micro Letters, vol. 9, no. 2, Dec. 2016, p. 18, doi:10.1007/s40820-016-0118-0.