Y. Y. Kannangara, R. Wijesena, R. M. G. Rajapakse, and K. M. N. de Silva, “Heterogeneous photocatalytic degradation of toluene in static environment employing thin films of nitrogen-doped nano-titanium dioxide”, Int. Nano Lett., vol. 8, no. 1 (March 2018), Apr. 2018, doi: 10.1007/s40089-018-0230-x.