@article{vanani_aminataei_2011,  title={Operational Tau approximation for a general class of fractional integro-differential equations},  volume={30},  ISSN={1807-0302},  url={https://doi.org/10.1590/S1807-03022011000300010},  DOI={10.1590/S1807-03022011000300010},  number={3},  journal={Computational & Applied Mathematics},  publisher={Sociedade Brasileira de Matemática Aplicada e Computacional},  author={Vanani, S. Karimi and Aminataei, A.},  year={2011},  pages={655–674} }