Surface layer composition of titania produced by various methods: the change of layer state under illumination / V. Zakharenko, E. Daibova, N. Kosova, O. Zmeeva // IOP Conference Series: Materials Science and Engineering. 2016. Vol. 112. P. 012015 (1-7). URL: http://vital.lib.tsu.ru/vital/access/manager/Repository/vtls:000554241