@article{ghorbani-vaghei_toghraei-semiromi_karimi-nami_2011,  title={One-pot synthesis of 4H-Chromene and Dihydropyrano[3,2-c]chromene derivatives in hydroalcoholic media},  volume={22},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532011000500013},  DOI={10.1590/S0103-50532011000500013},  number={5},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Ghorbani-Vaghei, Ramin and Toghraei-Semiromi, Zahra and Karimi-Nami, Rahman},  year={2011},  month={May},  pages={905–909} }