@article{ulusoy_gürkan_2009,  title={A novel indicator reaction for the catalytic determination of V(V) at ppb levels by the kinetic spectrophotometric method},  volume={34},  ISSN={0100-4670},  url={https://doi.org/10.1590/S0100-46702009000400005},  DOI={10.1590/S0100-46702009000400005},  number={4},  journal={Eclética Química},  publisher={Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP},  author={Ulusoy, Halil İbrahim and Gürkan, Ramazan},  year={2009},  month={Oct},  pages={49–64} }