@article{sworakowski_1999,  title={Effect of polar molecules on the transport and localization of charge carriers in molecular materials},  volume={29},  ISSN={0103-9733},  url={https://doi.org/10.1590/S0103-97331999000200013},  DOI={10.1590/S0103-97331999000200013},  number={2},  journal={Brazilian Journal of Physics},  publisher={Sociedade Brasileira de Física},  author={Sworakowski, Juliusz},  year={1999},  month={Jun},  pages={318–331} }