@article{li_zheng_zhu_liu_qu_2007,  title={An expendient method for the synthesis of bis(acylhydrazones) under microwave irradiation in solvent-free medium},  volume={24},  ISSN={0104-6632},  url={https://doi.org/10.1590/S0104-66322007000400001},  DOI={10.1590/S0104-66322007000400001},  number={4},  journal={Brazilian Journal of Chemical Engineering},  publisher={Brazilian Society of Chemical Engineering},  author={Li, J. P. and Zheng, P. Z. and Zhu, J. G. and Liu, R.J. and Qu, G. R.},  year={2007},  month={Oct},  pages={471–475} }