@article{oliveira_almeida_santos_2004,  title={Structure and electronic properties of alkylthiophenes coupled by Head-to-Tail and Head-to-Head regioselectivity},  volume={15},  ISSN={0103-5053},  url={https://doi.org/10.1590/S0103-50532004000600008},  DOI={10.1590/S0103-50532004000600008},  number={6},  journal={Journal of the Brazilian Chemical Society},  publisher={Sociedade Brasileira de Química},  author={Oliveira, Marcos A. de and Almeida, Wagner B. de and Santos, Hélio F. dos},  year={2004},  month={Nov},  pages={832–838} }