@article{ibrahim_elhaes_hameed_essa_2008,  title={Spectroscopic analysis of C80 doping with group III and group V elements using semiempirical PM3 molecular modelling technique},  volume={33},  ISSN={0100-4670},  url={https://doi.org/10.1590/S0100-46702008000100003},  DOI={10.1590/S0100-46702008000100003},  number={1},  journal={Eclética Química},  publisher={Fundação Editora da Universidade Estadual Paulista Júlio de Mesquita Filho - UNESP},  author={Ibrahim, Medhat and ElHaes, Hanan and Hameed, Ali Jameel and Essa, Ali Hashem},  year={2008},  pages={21–27} }