Toxicity assessment of metoprolol and its photodegradation mixtures obtained by using different type of TiO2 catalysts in the mammalian cell lines Autori: Dragana Četojević-Simin, S. Armaković, D. Šojić, B. Abramović Časopis: Science of The Total Environment DOI: 10.1016/j.scitotenv.2013.06.083