@article{georgieva_anastasov_nikolov_2008,  title={Deactivation properties of a high-productive vanadia-titania catalyst for oxidation of o-xylene to phthalic anhydride},  volume={25},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322008000200013},  DOI={10.1590/S0104-66322008000200013},  number={2},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Georgieva, A. T. and Anastasov, A. I. and Nikolov, V. A.},  year={2008},  month={Apr},  pages={351–364} }