@book{Monje2010,
	title={Fractional-order systems and controls: fundamentals and applications},
	author={Monje, Concepci{\'o}n A and Chen, YangQuan and Vinagre, Blas M and Xue, Dingyu and Feliu-Batlle, Vicente},
	year={2010},
	publisher={Springer Science \& Business Media}
}

@article{Valério2006,
	title={Tuning of fractional PID controllers with Ziegler--Nichols-type rules},
	author={Val{\'e}rio, Duarte and da Costa, Jos{\'e} S{\'a}},
	journal={Signal Processing},
	volume={86},
	number={10},
	pages={2771--2784},
	year={2006},
	publisher={Elsevier}
}

@article{Barbosa2010,
	title={Effect of fractional orders in the velocity control of a servo system},
	author={Barbosa, Ramiro S and Machado, JA Tenreiro and Jesus, Isabel S},
	journal={Computers \& Mathematics with Applications},
	volume={59},
	number={5},
	pages={1679--1686},
	year={2010},
	publisher={Elsevier}
}