@article{mallakpour_yousefian_2007,  title={Reaction of aromatic carboxylic acids with isocyanates using ionic liquids as novel and efficient media},  volume={18},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532007000600017},  DOI={10.1590/S0103-50532007000600017},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Mallakpour, Shadpour and Yousefian, Hamed},  year={2007},  pages={1220–1223} }