@article{alves_calado_donnici_matencio_2011,  title={Synthesis and characterization of new 3-substituted thiophene copolymers},  volume={22},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532011000200009},  DOI={10.1590/S0103-50532011000200009},  number={2},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Alves, Marcos R. A and Calado, Hállen D. R and Donnici, Claudio L and Matencio, Tulio},  year={2011},  month={Feb},  pages={248–256} }