Analysis of photocatalytic performance of nanostructured pyrogenic titanium dioxide powders in view of their polydispersity and phase transition : critical anatase particle size as a factor for suppression of charge recombinationMoiseev, Anna; Kritševskaja, Marina; Qi, Fei; Weber, Alfred; Deubener, JoachimChemical engineering journal2013 / p. 614-621 : ill https://doi.org/10.1016/j.cej.2013.05.038 Behavior of Estonian oil shale in acidic oxidative conditionsNiidu, Allan; Grenman, Henrik; Muldma, Kati; Kaldas, Kristiina; Mikli, Valdek; Lopp, MargusFrontiers in Chemical Engineering2022 / art. 590115 https://doi.org/10.3389/fceng.2022.590115